Finding the Fourth Proportional to 52,558.05, 72,530.31 and 28,685.25

Step by Step Solution

1. Step 1: Write the proportion equation
   52,558.05 : 72,530.31 = 28,685.25 : x
2. Step 2: Convert to fraction form
   52,558.05/72,530.31 = 28,685.25/x
3. Step 3: Cross multiply
   52,558.05x = 72,530.31 × 28,685.25
4. Step 4: Simplify right side
   52,558.05x = 2,080,550,074.93
5. Step 5: Solve for x
   x = 2,080,550,074.93/52,558.05
6. Step 6: Final answer
   x = 39,585.75