Finding the Fourth Proportional to 12,492.27, 17,242.81 and 7,188.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.27 : 17,242.81 = 7,188.80 : x
2. Step 2: Convert to fraction form
   12,492.27/17,242.81 = 7,188.80/x
3. Step 3: Cross multiply
   12,492.27x = 17,242.81 × 7,188.80
4. Step 4: Simplify right side
   12,492.27x = 123,955,008.34
5. Step 5: Solve for x
   x = 123,955,008.34/12,492.27
6. Step 6: Final answer
   x = 9,922.54