Finding the Fourth Proportional to 12,647,990.34, 18,969,146.05 and 5,818,003.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,647,990.34 : 18,969,146.05 = 5,818,003.92 : x
2. Step 2: Convert to fraction form
   12,647,990.34/18,969,146.05 = 5,818,003.92/x
3. Step 3: Cross multiply
   12,647,990.34x = 18,969,146.05 × 5,818,003.92
4. Step 4: Simplify right side
   12,647,990.34x = 110,362,566,077,952.52
5. Step 5: Solve for x
   x = 110,362,566,077,952.52/12,647,990.34
6. Step 6: Final answer
   x = 8,725,699.74