Finding the Fourth Proportional to 12,108,822.90, 18,145,291.02 and 9,965,081.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,108,822.90 : 18,145,291.02 = 9,965,081.76 : x
2. Step 2: Convert to fraction form
   12,108,822.90/18,145,291.02 = 9,965,081.76/x
3. Step 3: Cross multiply
   12,108,822.90x = 18,145,291.02 × 9,965,081.76
4. Step 4: Simplify right side
   12,108,822.90x = 180,819,308,573,293.78
5. Step 5: Solve for x
   x = 180,819,308,573,293.78/12,108,822.90
6. Step 6: Final answer
   x = 14,932,855.99