Finding the Fourth Proportional to 52,490.25, 72,438.81 and 28,618.29

Step by Step Solution

1. Step 1: Write the proportion equation
   52,490.25 : 72,438.81 = 28,618.29 : x
2. Step 2: Convert to fraction form
   52,490.25/72,438.81 = 28,618.29/x
3. Step 3: Cross multiply
   52,490.25x = 72,438.81 × 28,618.29
4. Step 4: Simplify right side
   52,490.25x = 2,073,074,871.83
5. Step 5: Solve for x
   x = 2,073,074,871.83/52,490.25
6. Step 6: Final answer
   x = 39,494.48