Finding the Fourth Proportional to 42,589.38, 58,756.05 and 28,255.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,589.38 : 58,756.05 = 28,255.98 : x
2. Step 2: Convert to fraction form
   42,589.38/58,756.05 = 28,255.98/x
3. Step 3: Cross multiply
   42,589.38x = 58,756.05 × 28,255.98
4. Step 4: Simplify right side
   42,589.38x = 1,660,209,773.68
5. Step 5: Solve for x
   x = 1,660,209,773.68/42,589.38
6. Step 6: Final answer
   x = 38,981.78