Finding the Fourth Proportional to 12,693.83, 17,517.90 and 8,437.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.83 : 17,517.90 = 8,437.47 : x
2. Step 2: Convert to fraction form
   12,693.83/17,517.90 = 8,437.47/x
3. Step 3: Cross multiply
   12,693.83x = 17,517.90 × 8,437.47
4. Step 4: Simplify right side
   12,693.83x = 147,806,755.71
5. Step 5: Solve for x
   x = 147,806,755.71/12,693.83
6. Step 6: Final answer
   x = 11,643.99