Finding the Fourth Proportional to 52,651.52, 72,659.15 and 28,778.21

Step by Step Solution

1. Step 1: Write the proportion equation
   52,651.52 : 72,659.15 = 28,778.21 : x
2. Step 2: Convert to fraction form
   52,651.52/72,659.15 = 28,778.21/x
3. Step 3: Cross multiply
   52,651.52x = 72,659.15 × 28,778.21
4. Step 4: Simplify right side
   52,651.52x = 2,090,999,769.93
5. Step 5: Solve for x
   x = 2,090,999,769.93/52,651.52
6. Step 6: Final answer
   x = 39,713.95