Finding the Fourth Proportional to 72,521.30, 108,585.12 and 37,391.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,521.30 : 108,585.12 = 37,391.60 : x
2. Step 2: Convert to fraction form
   72,521.30/108,585.12 = 37,391.60/x
3. Step 3: Cross multiply
   72,521.30x = 108,585.12 × 37,391.60
4. Step 4: Simplify right side
   72,521.30x = 4,060,171,372.99
5. Step 5: Solve for x
   x = 4,060,171,372.99/72,521.30
6. Step 6: Final answer
   x = 55,985.92