Finding the Fourth Proportional to 123,990.48, 171,107.10 and 67,401.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,990.48 : 171,107.10 = 67,401.72 : x
2. Step 2: Convert to fraction form
   123,990.48/171,107.10 = 67,401.72/x
3. Step 3: Cross multiply
   123,990.48x = 171,107.10 × 67,401.72
4. Step 4: Simplify right side
   123,990.48x = 11,532,912,844.21
5. Step 5: Solve for x
   x = 11,532,912,844.21/123,990.48
6. Step 6: Final answer
   x = 93,014.50