Finding the Fourth Proportional to 11,387.31, 15,715.86 and 6,671.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,387.31 : 15,715.86 = 6,671.59 : x
2. Step 2: Convert to fraction form
   11,387.31/15,715.86 = 6,671.59/x
3. Step 3: Cross multiply
   11,387.31x = 15,715.86 × 6,671.59
4. Step 4: Simplify right side
   11,387.31x = 104,849,662.48
5. Step 5: Solve for x
   x = 104,849,662.48/11,387.31
6. Step 6: Final answer
   x = 9,207.59