Finding the Fourth Proportional to 76,589.42, 105,691.37 and 42,596.15

Step by Step Solution

1. Step 1: Write the proportion equation
   76,589.42 : 105,691.37 = 42,596.15 : x
2. Step 2: Convert to fraction form
   76,589.42/105,691.37 = 42,596.15/x
3. Step 3: Cross multiply
   76,589.42x = 105,691.37 × 42,596.15
4. Step 4: Simplify right side
   76,589.42x = 4,502,044,708.79
5. Step 5: Solve for x
   x = 4,502,044,708.79/76,589.42
6. Step 6: Final answer
   x = 58,781.55