Finding the Fourth Proportional to 123,942.83, 170,978.13 and 80,947.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123,942.83 : 170,978.13 = 80,947.49 : x
2. Step 2: Convert to fraction form
   123,942.83/170,978.13 = 80,947.49/x
3. Step 3: Cross multiply
   123,942.83x = 170,978.13 × 80,947.49
4. Step 4: Simplify right side
   123,942.83x = 13,840,249,613.50
5. Step 5: Solve for x
   x = 13,840,249,613.50/123,942.83
6. Step 6: Final answer
   x = 111,666.40