Finding the Fourth Proportional to 76,539.91, 105,626.34 and 42,086.11

Step by Step Solution

1. Step 1: Write the proportion equation
   76,539.91 : 105,626.34 = 42,086.11 : x
2. Step 2: Convert to fraction form
   76,539.91/105,626.34 = 42,086.11/x
3. Step 3: Cross multiply
   76,539.91x = 105,626.34 × 42,086.11
4. Step 4: Simplify right side
   76,539.91x = 4,445,401,764.14
5. Step 5: Solve for x
   x = 4,445,401,764.14/76,539.91
6. Step 6: Final answer
   x = 58,079.53