Finding the Fourth Proportional to 12,980.88, 17,915.34 and 7,316.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.88 : 17,915.34 = 7,316.70 : x
2. Step 2: Convert to fraction form
   12,980.88/17,915.34 = 7,316.70/x
3. Step 3: Cross multiply
   12,980.88x = 17,915.34 × 7,316.70
4. Step 4: Simplify right side
   12,980.88x = 131,081,168.18
5. Step 5: Solve for x
   x = 131,081,168.18/12,980.88
6. Step 6: Final answer
   x = 10,098.02