Finding the Fourth Proportional to 123,989.59, 171,107.34 and 67,402.18

Step by Step Solution

1. Step 1: Write the proportion equation
   123,989.59 : 171,107.34 = 67,402.18 : x
2. Step 2: Convert to fraction form
   123,989.59/171,107.34 = 67,402.18/x
3. Step 3: Cross multiply
   123,989.59x = 171,107.34 × 67,402.18
4. Step 4: Simplify right side
   123,989.59x = 11,533,006,537.45
5. Step 5: Solve for x
   x = 11,533,006,537.45/123,989.59
6. Step 6: Final answer
   x = 93,015.93