Finding the Fourth Proportional to 78,086.40, 107,757.93 and 42,276.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,086.40 : 107,757.93 = 42,276.12 : x
2. Step 2: Convert to fraction form
   78,086.40/107,757.93 = 42,276.12/x
3. Step 3: Cross multiply
   78,086.40x = 107,757.93 × 42,276.12
4. Step 4: Simplify right side
   78,086.40x = 4,555,587,179.63
5. Step 5: Solve for x
   x = 4,555,587,179.63/78,086.40
6. Step 6: Final answer
   x = 58,340.34