Finding the Fourth Proportional to 42,579.77, 58,715.52 and 31,807.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,579.77 : 58,715.52 = 31,807.76 : x
2. Step 2: Convert to fraction form
   42,579.77/58,715.52 = 31,807.76/x
3. Step 3: Cross multiply
   42,579.77x = 58,715.52 × 31,807.76
4. Step 4: Simplify right side
   42,579.77x = 1,867,608,874.86
5. Step 5: Solve for x
   x = 1,867,608,874.86/42,579.77
6. Step 6: Final answer
   x = 43,861.42