Finding the Fourth Proportional to 22,492.76, 31,040.50 and 12,421.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,492.76 : 31,040.50 = 12,421.18 : x
2. Step 2: Convert to fraction form
   22,492.76/31,040.50 = 12,421.18/x
3. Step 3: Cross multiply
   22,492.76x = 31,040.50 × 12,421.18
4. Step 4: Simplify right side
   22,492.76x = 385,559,637.79
5. Step 5: Solve for x
   x = 385,559,637.79/22,492.76
6. Step 6: Final answer
   x = 17,141.50