Finding the Fourth Proportional to 78,081.70, 107,752.70 and 42,271.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,081.70 : 107,752.70 = 42,271.68 : x
2. Step 2: Convert to fraction form
   78,081.70/107,752.70 = 42,271.68/x
3. Step 3: Cross multiply
   78,081.70x = 107,752.70 × 42,271.68
4. Step 4: Simplify right side
   78,081.70x = 4,554,887,653.54
5. Step 5: Solve for x
   x = 4,554,887,653.54/78,081.70
6. Step 6: Final answer
   x = 58,334.89