Finding the Fourth Proportional to 76,540.91, 105,627.72 and 42,087.11

Step by Step Solution

1. Step 1: Write the proportion equation
   76,540.91 : 105,627.72 = 42,087.11 : x
2. Step 2: Convert to fraction form
   76,540.91/105,627.72 = 42,087.11/x
3. Step 3: Cross multiply
   76,540.91x = 105,627.72 × 42,087.11
4. Step 4: Simplify right side
   76,540.91x = 4,445,565,470.69
5. Step 5: Solve for x
   x = 4,445,565,470.69/76,540.91
6. Step 6: Final answer
   x = 58,080.91