Finding the Fourth Proportional to 11,008,429.10, 16,459,499.55 and 8,138,647.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,008,429.10 : 16,459,499.55 = 8,138,647.70 : x
2. Step 2: Convert to fraction form
   11,008,429.10/16,459,499.55 = 8,138,647.70/x
3. Step 3: Cross multiply
   11,008,429.10x = 16,459,499.55 × 8,138,647.70
4. Step 4: Simplify right side
   11,008,429.10x = 133,958,068,155,758.55
5. Step 5: Solve for x
   x = 133,958,068,155,758.55/11,008,429.10
6. Step 6: Final answer
   x = 12,168,681.56