Finding the Fourth Proportional to 105,833.52, 146,057.76 and 69,961.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,833.52 : 146,057.76 = 69,961.20 : x
2. Step 2: Convert to fraction form
   105,833.52/146,057.76 = 69,961.20/x
3. Step 3: Cross multiply
   105,833.52x = 146,057.76 × 69,961.20
4. Step 4: Simplify right side
   105,833.52x = 10,218,376,158.91
5. Step 5: Solve for x
   x = 10,218,376,158.91/105,833.52
6. Step 6: Final answer
   x = 96,551.42