Finding the Fourth Proportional to 105,864.57, 158,862.69 and 65,961.90

Step by Step Solution

1. Step 1: Write the proportion equation
   105,864.57 : 158,862.69 = 65,961.90 : x
2. Step 2: Convert to fraction form
   105,864.57/158,862.69 = 65,961.90/x
3. Step 3: Cross multiply
   105,864.57x = 158,862.69 × 65,961.90
4. Step 4: Simplify right side
   105,864.57x = 10,478,884,871.51
5. Step 5: Solve for x
   x = 10,478,884,871.51/105,864.57
6. Step 6: Final answer
   x = 98,983.87