Finding the Fourth Proportional to 78,085.24, 107,757.50 and 42,275.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,085.24 : 107,757.50 = 42,275.25 : x
2. Step 2: Convert to fraction form
   78,085.24/107,757.50 = 42,275.25/x
3. Step 3: Cross multiply
   78,085.24x = 107,757.50 × 42,275.25
4. Step 4: Simplify right side
   78,085.24x = 4,555,475,040.50
5. Step 5: Solve for x
   x = 4,555,475,040.50/78,085.24
6. Step 6: Final answer
   x = 58,339.77