Finding the Fourth Proportional to 78,676.71, 108,575.10 and 42,866.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,676.71 : 108,575.10 = 42,866.72 : x
2. Step 2: Convert to fraction form
   78,676.71/108,575.10 = 42,866.72/x
3. Step 3: Cross multiply
   78,676.71x = 108,575.10 × 42,866.72
4. Step 4: Simplify right side
   78,676.71x = 4,654,257,867.80
5. Step 5: Solve for x
   x = 4,654,257,867.80/78,676.71
6. Step 6: Final answer
   x = 59,156.74