Finding the Fourth Proportional to 78,061.36, 107,724.59 and 42,251.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,061.36 : 107,724.59 = 42,251.31 : x
2. Step 2: Convert to fraction form
   78,061.36/107,724.59 = 42,251.31/x
3. Step 3: Cross multiply
   78,061.36x = 107,724.59 × 42,251.31
4. Step 4: Simplify right side
   78,061.36x = 4,551,504,835.46
5. Step 5: Solve for x
   x = 4,551,504,835.46/78,061.36
6. Step 6: Final answer
   x = 58,306.76