Finding the Fourth Proportional to 52,405.89, 72,320.25 and 28,532.71

Step by Step Solution

1. Step 1: Write the proportion equation
   52,405.89 : 72,320.25 = 28,532.71 : x
2. Step 2: Convert to fraction form
   52,405.89/72,320.25 = 28,532.71/x
3. Step 3: Cross multiply
   52,405.89x = 72,320.25 × 28,532.71
4. Step 4: Simplify right side
   52,405.89x = 2,063,492,720.38
5. Step 5: Solve for x
   x = 2,063,492,720.38/52,405.89
6. Step 6: Final answer
   x = 39,375.21