Finding the Fourth Proportional to 13,322.30, 19,966.15 and 5,415.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,322.30 : 19,966.15 = 5,415.61 : x
2. Step 2: Convert to fraction form
   13,322.30/19,966.15 = 5,415.61/x
3. Step 3: Cross multiply
   13,322.30x = 19,966.15 × 5,415.61
4. Step 4: Simplify right side
   13,322.30x = 108,128,845.43
5. Step 5: Solve for x
   x = 108,128,845.43/13,322.30
6. Step 6: Final answer
   x = 8,116.38