Finding the Fourth Proportional to 78,085.98, 107,758.50 and 42,275.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,085.98 : 107,758.50 = 42,275.99 : x
2. Step 2: Convert to fraction form
   78,085.98/107,758.50 = 42,275.99/x
3. Step 3: Cross multiply
   78,085.98x = 107,758.50 × 42,275.99
4. Step 4: Simplify right side
   78,085.98x = 4,555,596,729.62
5. Step 5: Solve for x
   x = 4,555,596,729.62/78,085.98
6. Step 6: Final answer
   x = 58,340.78