Finding the Fourth Proportional to 78,085.89, 107,758.59 and 42,275.93

Step by Step Solution

1. Step 1: Write the proportion equation
   78,085.89 : 107,758.59 = 42,275.93 : x
2. Step 2: Convert to fraction form
   78,085.89/107,758.59 = 42,275.93/x
3. Step 3: Cross multiply
   78,085.89x = 107,758.59 × 42,275.93
4. Step 4: Simplify right side
   78,085.89x = 4,555,593,910.41
5. Step 5: Solve for x
   x = 4,555,593,910.41/78,085.89
6. Step 6: Final answer
   x = 58,340.81