Finding the Fourth Proportional to 9,911,185.92, 14,870,960.64 and 5,418,213.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,911,185.92 : 14,870,960.64 = 5,418,213.12 : x
2. Step 2: Convert to fraction form
   9,911,185.92/14,870,960.64 = 5,418,213.12/x
3. Step 3: Cross multiply
   9,911,185.92x = 14,870,960.64 × 5,418,213.12
4. Step 4: Simplify right side
   9,911,185.92x = 80,574,034,046,651.61
5. Step 5: Solve for x
   x = 80,574,034,046,651.61/9,911,185.92
6. Step 6: Final answer
   x = 8,129,605.75