Finding the Fourth Proportional to 12,580.71, 17,360.32 and 6,915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,580.71 : 17,360.32 = 6,915.30 : x
2. Step 2: Convert to fraction form
   12,580.71/17,360.32 = 6,915.30/x
3. Step 3: Cross multiply
   12,580.71x = 17,360.32 × 6,915.30
4. Step 4: Simplify right side
   12,580.71x = 120,051,820.90
5. Step 5: Solve for x
   x = 120,051,820.90/12,580.71
6. Step 6: Final answer
   x = 9,542.53