Finding the Fourth Proportional to 52,559.05, 72,531.69 and 28,686.25

Step by Step Solution

1. Step 1: Write the proportion equation
   52,559.05 : 72,531.69 = 28,686.25 : x
2. Step 2: Convert to fraction form
   52,559.05/72,531.69 = 28,686.25/x
3. Step 3: Cross multiply
   52,559.05x = 72,531.69 × 28,686.25
4. Step 4: Simplify right side
   52,559.05x = 2,080,662,192.26
5. Step 5: Solve for x
   x = 2,080,662,192.26/52,559.05
6. Step 6: Final answer
   x = 39,587.13