Finding the Fourth Proportional to 52,636.52, 72,636.22 and 31,140.20

Step by Step Solution

1. Step 1: Write the proportion equation
   52,636.52 : 72,636.22 = 31,140.20 : x
2. Step 2: Convert to fraction form
   52,636.52/72,636.22 = 31,140.20/x
3. Step 3: Cross multiply
   52,636.52x = 72,636.22 × 31,140.20
4. Step 4: Simplify right side
   52,636.52x = 2,261,906,418.04
5. Step 5: Solve for x
   x = 2,261,906,418.04/52,636.52
6. Step 6: Final answer
   x = 42,972.19