Finding the Fourth Proportional to 12,141,404.40, 18,243,599.40 and 10,755,721.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141,404.40 : 18,243,599.40 = 10,755,721.20 : x
2. Step 2: Convert to fraction form
   12,141,404.40/18,243,599.40 = 10,755,721.20/x
3. Step 3: Cross multiply
   12,141,404.40x = 18,243,599.40 × 10,755,721.20
4. Step 4: Simplify right side
   12,141,404.40x = 196,223,068,830,887.25
5. Step 5: Solve for x
   x = 196,223,068,830,887.25/12,141,404.40
6. Step 6: Final answer
   x = 16,161,480.37