Finding the Fourth Proportional to 22,492.56, 31,039.56 and 12,421

Step by Step Solution

1. Step 1: Write the proportion equation
   22,492.56 : 31,039.56 = 12,421 : x
2. Step 2: Convert to fraction form
   22,492.56/31,039.56 = 12,421/x
3. Step 3: Cross multiply
   22,492.56x = 31,039.56 × 12,421
4. Step 4: Simplify right side
   22,492.56x = 385,542,374.76
5. Step 5: Solve for x
   x = 385,542,374.76/22,492.56
6. Step 6: Final answer
   x = 17,140.88