Finding the Fourth Proportional to 11,308.72, 15,606 and 6,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.72 : 15,606 = 6,340.72 : x
2. Step 2: Convert to fraction form
   11,308.72/15,606 = 6,340.72/x
3. Step 3: Cross multiply
   11,308.72x = 15,606 × 6,340.72
4. Step 4: Simplify right side
   11,308.72x = 98,953,276.32
5. Step 5: Solve for x
   x = 98,953,276.32/11,308.72
6. Step 6: Final answer
   x = 8,750.17