Finding the Fourth Proportional to 52,613.43, 72,605.34 and 28,740.21

Step by Step Solution

1. Step 1: Write the proportion equation
   52,613.43 : 72,605.34 = 28,740.21 : x
2. Step 2: Convert to fraction form
   52,613.43/72,605.34 = 28,740.21/x
3. Step 3: Cross multiply
   52,613.43x = 72,605.34 × 28,740.21
4. Step 4: Simplify right side
   52,613.43x = 2,086,692,718.72
5. Step 5: Solve for x
   x = 2,086,692,718.72/52,613.43
6. Step 6: Final answer
   x = 39,660.84