Finding the Fourth Proportional to 52,280.57, 72,147.83 and 28,407.65

Step by Step Solution

1. Step 1: Write the proportion equation
   52,280.57 : 72,147.83 = 28,407.65 : x
2. Step 2: Convert to fraction form
   52,280.57/72,147.83 = 28,407.65/x
3. Step 3: Cross multiply
   52,280.57x = 72,147.83 × 28,407.65
4. Step 4: Simplify right side
   52,280.57x = 2,049,549,800.12
5. Step 5: Solve for x
   x = 2,049,549,800.12/52,280.57
6. Step 6: Final answer
   x = 39,202.90