Finding the Fourth Proportional to 12,915,598, 17,819,978.52 and 8,990,955.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915,598 : 17,819,978.52 = 8,990,955.76 : x
2. Step 2: Convert to fraction form
   12,915,598/17,819,978.52 = 8,990,955.76/x
3. Step 3: Cross multiply
   12,915,598x = 17,819,978.52 × 8,990,955.76
4. Step 4: Simplify right side
   12,915,598x = 160,218,638,517,470.28
5. Step 5: Solve for x
   x = 160,218,638,517,470.28/12,915,598
6. Step 6: Final answer
   x = 12,405,049.96