Finding the Fourth Proportional to 78,085.77, 107,758.43 and 42,275.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,085.77 : 107,758.43 = 42,275.80 : x
2. Step 2: Convert to fraction form
   78,085.77/107,758.43 = 42,275.80/x
3. Step 3: Cross multiply
   78,085.77x = 107,758.43 × 42,275.80
4. Step 4: Simplify right side
   78,085.77x = 4,555,573,834.99
5. Step 5: Solve for x
   x = 4,555,573,834.99/78,085.77
6. Step 6: Final answer
   x = 58,340.64