Finding the Fourth Proportional to 52,890.52, 72,990.87 and 31,391.41

Step by Step Solution

1. Step 1: Write the proportion equation
   52,890.52 : 72,990.87 = 31,391.41 : x
2. Step 2: Convert to fraction form
   52,890.52/72,990.87 = 31,391.41/x
3. Step 3: Cross multiply
   52,890.52x = 72,990.87 × 31,391.41
4. Step 4: Simplify right side
   52,890.52x = 2,291,286,326.43
5. Step 5: Solve for x
   x = 2,291,286,326.43/52,890.52
6. Step 6: Final answer
   x = 43,321.30