Finding the Fourth Proportional to 52,621.76, 72,616.88 and 28,748.57

Step by Step Solution

1. Step 1: Write the proportion equation
   52,621.76 : 72,616.88 = 28,748.57 : x
2. Step 2: Convert to fraction form
   52,621.76/72,616.88 = 28,748.57/x
3. Step 3: Cross multiply
   52,621.76x = 72,616.88 × 28,748.57
4. Step 4: Simplify right side
   52,621.76x = 2,087,630,951.03
5. Step 5: Solve for x
   x = 2,087,630,951.03/52,621.76
6. Step 6: Final answer
   x = 39,672.39