Finding the Fourth Proportional to 212,521.37, 318,979.15 and 107,414.15

Step by Step Solution

1. Step 1: Write the proportion equation
   212,521.37 : 318,979.15 = 107,414.15 : x
2. Step 2: Convert to fraction form
   212,521.37/318,979.15 = 107,414.15/x
3. Step 3: Cross multiply
   212,521.37x = 318,979.15 × 107,414.15
4. Step 4: Simplify right side
   212,521.37x = 34,262,872,401.54
5. Step 5: Solve for x
   x = 34,262,872,401.54/212,521.37
6. Step 6: Final answer
   x = 161,220.84