Finding the Fourth Proportional to 22,492.52, 31,039.01 and 12,420.23

Step by Step Solution

1. Step 1: Write the proportion equation
   22,492.52 : 31,039.01 = 12,420.23 : x
2. Step 2: Convert to fraction form
   22,492.52/31,039.01 = 12,420.23/x
3. Step 3: Cross multiply
   22,492.52x = 31,039.01 × 12,420.23
4. Step 4: Simplify right side
   22,492.52x = 385,511,643.17
5. Step 5: Solve for x
   x = 385,511,643.17/22,492.52
6. Step 6: Final answer
   x = 17,139.55