Finding the Fourth Proportional to 52,687.68, 72,780 and 42,152.64

Step by Step Solution

1. Step 1: Write the proportion equation
   52,687.68 : 72,780 = 42,152.64 : x
2. Step 2: Convert to fraction form
   52,687.68/72,780 = 42,152.64/x
3. Step 3: Cross multiply
   52,687.68x = 72,780 × 42,152.64
4. Step 4: Simplify right side
   52,687.68x = 3,067,869,139.20
5. Step 5: Solve for x
   x = 3,067,869,139.20/52,687.68
6. Step 6: Final answer
   x = 58,227.45