Finding the Fourth Proportional to 12,985.10, 17,915.14 and 7,319.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.10 : 17,915.14 = 7,319.15 : x
2. Step 2: Convert to fraction form
   12,985.10/17,915.14 = 7,319.15/x
3. Step 3: Cross multiply
   12,985.10x = 17,915.14 × 7,319.15
4. Step 4: Simplify right side
   12,985.10x = 131,123,596.93
5. Step 5: Solve for x
   x = 131,123,596.93/12,985.10
6. Step 6: Final answer
   x = 10,098.00