Finding the Fourth Proportional to 78,676.15, 108,574.33 and 42,866.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,676.15 : 108,574.33 = 42,866.15 : x
2. Step 2: Convert to fraction form
   78,676.15/108,574.33 = 42,866.15/x
3. Step 3: Cross multiply
   78,676.15x = 108,574.33 × 42,866.15
4. Step 4: Simplify right side
   78,676.15x = 4,654,163,515.93
5. Step 5: Solve for x
   x = 4,654,163,515.93/78,676.15
6. Step 6: Final answer
   x = 59,155.96