Finding the Fourth Proportional to 76,388.86, 105,416.67 and 42,397.36

Step by Step Solution

1. Step 1: Write the proportion equation
   76,388.86 : 105,416.67 = 42,397.36 : x
2. Step 2: Convert to fraction form
   76,388.86/105,416.67 = 42,397.36/x
3. Step 3: Cross multiply
   76,388.86x = 105,416.67 × 42,397.36
4. Step 4: Simplify right side
   76,388.86x = 4,469,388,296.00
5. Step 5: Solve for x
   x = 4,469,388,296.00/76,388.86
6. Step 6: Final answer
   x = 58,508.38