Finding the Fourth Proportional to 52,488.74, 72,436.74 and 28,616.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,488.74 : 72,436.74 = 28,616.78 : x
2. Step 2: Convert to fraction form
   52,488.74/72,436.74 = 28,616.78/x
3. Step 3: Cross multiply
   52,488.74x = 72,436.74 × 28,616.78
4. Step 4: Simplify right side
   52,488.74x = 2,072,906,326.28
5. Step 5: Solve for x
   x = 2,072,906,326.28/52,488.74
6. Step 6: Final answer
   x = 39,492.40