Finding the Fourth Proportional to 78,676.46, 108,574.76 and 42,866.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,676.46 : 108,574.76 = 42,866.47 : x
2. Step 2: Convert to fraction form
   78,676.46/108,574.76 = 42,866.47/x
3. Step 3: Cross multiply
   78,676.46x = 108,574.76 × 42,866.47
4. Step 4: Simplify right side
   78,676.46x = 4,654,215,935.09
5. Step 5: Solve for x
   x = 4,654,215,935.09/78,676.46
6. Step 6: Final answer
   x = 59,156.40