Finding the Fourth Proportional to 78,086.74, 107,759.56 and 42,276.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,086.74 : 107,759.56 = 42,276.75 : x
2. Step 2: Convert to fraction form
   78,086.74/107,759.56 = 42,276.75/x
3. Step 3: Cross multiply
   78,086.74x = 107,759.56 × 42,276.75
4. Step 4: Simplify right side
   78,086.74x = 4,555,723,978.23
5. Step 5: Solve for x
   x = 4,555,723,978.23/78,086.74
6. Step 6: Final answer
   x = 58,341.84