Finding the Fourth Proportional to 78,085.73, 107,758.35 and 42,275.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,085.73 : 107,758.35 = 42,275.72 : x
2. Step 2: Convert to fraction form
   78,085.73/107,758.35 = 42,275.72/x
3. Step 3: Cross multiply
   78,085.73x = 107,758.35 × 42,275.72
4. Step 4: Simplify right side
   78,085.73x = 4,555,562,101.66
5. Step 5: Solve for x
   x = 4,555,562,101.66/78,085.73
6. Step 6: Final answer
   x = 58,340.52