Finding the Fourth Proportional to 105,881.72, 146,121.54 and 63,439.34

Step by Step Solution

1. Step 1: Write the proportion equation
   105,881.72 : 146,121.54 = 63,439.34 : x
2. Step 2: Convert to fraction form
   105,881.72/146,121.54 = 63,439.34/x
3. Step 3: Cross multiply
   105,881.72x = 146,121.54 × 63,439.34
4. Step 4: Simplify right side
   105,881.72x = 9,269,854,057.38
5. Step 5: Solve for x
   x = 9,269,854,057.38/105,881.72
6. Step 6: Final answer
   x = 87,549.15