Finding the Fourth Proportional to 76,831.04, 106,028.15 and 42,379.74

Step by Step Solution

1. Step 1: Write the proportion equation
   76,831.04 : 106,028.15 = 42,379.74 : x
2. Step 2: Convert to fraction form
   76,831.04/106,028.15 = 42,379.74/x
3. Step 3: Cross multiply
   76,831.04x = 106,028.15 × 42,379.74
4. Step 4: Simplify right side
   76,831.04x = 4,493,445,217.78
5. Step 5: Solve for x
   x = 4,493,445,217.78/76,831.04
6. Step 6: Final answer
   x = 58,484.77