Finding the Fourth Proportional to 78,085.74, 107,758.19 and 42,275.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,085.74 : 107,758.19 = 42,275.75 : x
2. Step 2: Convert to fraction form
   78,085.74/107,758.19 = 42,275.75/x
3. Step 3: Cross multiply
   78,085.74x = 107,758.19 × 42,275.75
4. Step 4: Simplify right side
   78,085.74x = 4,555,558,089.51
5. Step 5: Solve for x
   x = 4,555,558,089.51/78,085.74
6. Step 6: Final answer
   x = 58,340.46