Finding the Fourth Proportional to 12,492.27, 17,238.84 and 7,188.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.27 : 17,238.84 = 7,188.81 : x
2. Step 2: Convert to fraction form
   12,492.27/17,238.84 = 7,188.81/x
3. Step 3: Cross multiply
   12,492.27x = 17,238.84 × 7,188.81
4. Step 4: Simplify right side
   12,492.27x = 123,926,745.38
5. Step 5: Solve for x
   x = 123,926,745.38/12,492.27
6. Step 6: Final answer
   x = 9,920.27