Finding the Fourth Proportional to 42,081.31, 58,106.33 and 40,178.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,081.31 : 58,106.33 = 40,178.62 : x
2. Step 2: Convert to fraction form
   42,081.31/58,106.33 = 40,178.62/x
3. Step 3: Cross multiply
   42,081.31x = 58,106.33 × 40,178.62
4. Step 4: Simplify right side
   42,081.31x = 2,334,632,152.66
5. Step 5: Solve for x
   x = 2,334,632,152.66/42,081.31
6. Step 6: Final answer
   x = 55,479.07