Finding the Fourth Proportional to 2,656,974,080.12, 3,983,919,216.78 and 1,257,946,607.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656,974,080.12 : 3,983,919,216.78 = 1,257,946,607.48 : x
2. Step 2: Convert to fraction form
   2,656,974,080.12/3,983,919,216.78 = 1,257,946,607.48/x
3. Step 3: Cross multiply
   2,656,974,080.12x = 3,983,919,216.78 × 1,257,946,607.48
4. Step 4: Simplify right side
   2,656,974,080.12x = 5,011,557,663,222,779,904
5. Step 5: Solve for x
   x = 5,011,557,663,222,779,904/2,656,974,080.12
6. Step 6: Final answer
   x = 1,886,189,895.76