Finding the Fourth Proportional to 78,320.12, 108,081.77 and 42,510.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,320.12 : 108,081.77 = 42,510.12 : x
2. Step 2: Convert to fraction form
   78,320.12/108,081.77 = 42,510.12/x
3. Step 3: Cross multiply
   78,320.12x = 108,081.77 × 42,510.12
4. Step 4: Simplify right side
   78,320.12x = 4,594,568,514.21
5. Step 5: Solve for x
   x = 4,594,568,514.21/78,320.12
6. Step 6: Final answer
   x = 58,663.97