Finding the Fourth Proportional to 21,044,138, 31,475,016.12 and 12,387,612.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,044,138 : 31,475,016.12 = 12,387,612.92 : x
2. Step 2: Convert to fraction form
   21,044,138/31,475,016.12 = 12,387,612.92/x
3. Step 3: Cross multiply
   21,044,138x = 31,475,016.12 × 12,387,612.92
4. Step 4: Simplify right side
   21,044,138x = 389,900,316,345,320.25
5. Step 5: Solve for x
   x = 389,900,316,345,320.25/21,044,138
6. Step 6: Final answer
   x = 18,527,739.95