Finding the Fourth Proportional to 52,862.72, 72,952.65 and 28,990.25

Step by Step Solution

1. Step 1: Write the proportion equation
   52,862.72 : 72,952.65 = 28,990.25 : x
2. Step 2: Convert to fraction form
   52,862.72/72,952.65 = 28,990.25/x
3. Step 3: Cross multiply
   52,862.72x = 72,952.65 × 28,990.25
4. Step 4: Simplify right side
   52,862.72x = 2,114,915,196.90
5. Step 5: Solve for x
   x = 2,114,915,196.90/52,862.72
6. Step 6: Final answer
   x = 40,007.69