Finding the Fourth Proportional to 22,643.42, 31,248.72 and 12,572.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,643.42 : 31,248.72 = 12,572.02 : x
2. Step 2: Convert to fraction form
   22,643.42/31,248.72 = 12,572.02/x
3. Step 3: Cross multiply
   22,643.42x = 31,248.72 × 12,572.02
4. Step 4: Simplify right side
   22,643.42x = 392,859,501.84
5. Step 5: Solve for x
   x = 392,859,501.84/22,643.42
6. Step 6: Final answer
   x = 17,349.83