Finding the Fourth Proportional to 52,713.32, 72,743.94 and 28,840.20

Step by Step Solution

1. Step 1: Write the proportion equation
   52,713.32 : 72,743.94 = 28,840.20 : x
2. Step 2: Convert to fraction form
   52,713.32/72,743.94 = 28,840.20/x
3. Step 3: Cross multiply
   52,713.32x = 72,743.94 × 28,840.20
4. Step 4: Simplify right side
   52,713.32x = 2,097,949,778.39
5. Step 5: Solve for x
   x = 2,097,949,778.39/52,713.32
6. Step 6: Final answer
   x = 39,799.23