Finding the Fourth Proportional to 42,426.17, 58,509 and 28,834.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,426.17 : 58,509 = 28,834.57 : x
2. Step 2: Convert to fraction form
   42,426.17/58,509 = 28,834.57/x
3. Step 3: Cross multiply
   42,426.17x = 58,509 × 28,834.57
4. Step 4: Simplify right side
   42,426.17x = 1,687,081,856.13
5. Step 5: Solve for x
   x = 1,687,081,856.13/42,426.17
6. Step 6: Final answer
   x = 39,765.12