Finding the Fourth Proportional to 123,233.76, 170,062.47 and 66,645

Step by Step Solution

1. Step 1: Write the proportion equation
   123,233.76 : 170,062.47 = 66,645 : x
2. Step 2: Convert to fraction form
   123,233.76/170,062.47 = 66,645/x
3. Step 3: Cross multiply
   123,233.76x = 170,062.47 × 66,645
4. Step 4: Simplify right side
   123,233.76x = 11,333,813,313.15
5. Step 5: Solve for x
   x = 11,333,813,313.15/123,233.76
6. Step 6: Final answer
   x = 91,970.04