Finding the Fourth Proportional to 52,621.38, 72,617.76 and 28,748.45

Step by Step Solution

1. Step 1: Write the proportion equation
   52,621.38 : 72,617.76 = 28,748.45 : x
2. Step 2: Convert to fraction form
   52,621.38/72,617.76 = 28,748.45/x
3. Step 3: Cross multiply
   52,621.38x = 72,617.76 × 28,748.45
4. Step 4: Simplify right side
   52,621.38x = 2,087,647,679.38
5. Step 5: Solve for x
   x = 2,087,647,679.38/52,621.38
6. Step 6: Final answer
   x = 39,672.99