Finding the Fourth Proportional to 123,345.31, 170,216.54 and 66,756.69

Step by Step Solution

1. Step 1: Write the proportion equation
   123,345.31 : 170,216.54 = 66,756.69 : x
2. Step 2: Convert to fraction form
   123,345.31/170,216.54 = 66,756.69/x
3. Step 3: Cross multiply
   123,345.31x = 170,216.54 × 66,756.69
4. Step 4: Simplify right side
   123,345.31x = 11,363,092,793.65
5. Step 5: Solve for x
   x = 11,363,092,793.65/123,345.31
6. Step 6: Final answer
   x = 92,124.24