Finding the Fourth Proportional to 123,078.60, 169,769.52 and 77,676.48

Step by Step Solution

1. Step 1: Write the proportion equation
   123,078.60 : 169,769.52 = 77,676.48 : x
2. Step 2: Convert to fraction form
   123,078.60/169,769.52 = 77,676.48/x
3. Step 3: Cross multiply
   123,078.60x = 169,769.52 × 77,676.48
4. Step 4: Simplify right side
   123,078.60x = 13,187,098,724.89
5. Step 5: Solve for x
   x = 13,187,098,724.89/123,078.60
6. Step 6: Final answer
   x = 107,143.72