Finding the Fourth Proportional to 78,676.28, 108,574.50 and 42,866.27

Step by Step Solution

1. Step 1: Write the proportion equation
   78,676.28 : 108,574.50 = 42,866.27 : x
2. Step 2: Convert to fraction form
   78,676.28/108,574.50 = 42,866.27/x
3. Step 3: Cross multiply
   78,676.28x = 108,574.50 × 42,866.27
4. Step 4: Simplify right side
   78,676.28x = 4,654,183,832.12
5. Step 5: Solve for x
   x = 4,654,183,832.12/78,676.28
6. Step 6: Final answer
   x = 59,156.13