Finding the Fourth Proportional to 2,638,946,442.38, 3,956,500,434.78 and 1,239,209,443.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638,946,442.38 : 3,956,500,434.78 = 1,239,209,443.49 : x
2. Step 2: Convert to fraction form
   2,638,946,442.38/3,956,500,434.78 = 1,239,209,443.49/x
3. Step 3: Cross multiply
   2,638,946,442.38x = 3,956,500,434.78 × 1,239,209,443.49
4. Step 4: Simplify right side
   2,638,946,442.38x = 4,902,932,701,931,884,544
5. Step 5: Solve for x
   x = 4,902,932,701,931,884,544/2,638,946,442.38
6. Step 6: Final answer
   x = 1,857,912,924.34