Finding the Fourth Proportional to 12,492.76, 17,239.98 and 7,188.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.76 : 17,239.98 = 7,188.62 : x
2. Step 2: Convert to fraction form
   12,492.76/17,239.98 = 7,188.62/x
3. Step 3: Cross multiply
   12,492.76x = 17,239.98 × 7,188.62
4. Step 4: Simplify right side
   12,492.76x = 123,931,665.03
5. Step 5: Solve for x
   x = 123,931,665.03/12,492.76
6. Step 6: Final answer
   x = 9,920.28