Finding the Fourth Proportional to 123,342.57, 170,212.65 and 69,628.05

Step by Step Solution

1. Step 1: Write the proportion equation
   123,342.57 : 170,212.65 = 69,628.05 : x
2. Step 2: Convert to fraction form
   123,342.57/170,212.65 = 69,628.05/x
3. Step 3: Cross multiply
   123,342.57x = 170,212.65 × 69,628.05
4. Step 4: Simplify right side
   123,342.57x = 11,851,574,904.83
5. Step 5: Solve for x
   x = 11,851,574,904.83/123,342.57
6. Step 6: Final answer
   x = 96,086.65