Finding the Fourth Proportional to 105,868.57, 158,868.69 and 65,965.90

Step by Step Solution

1. Step 1: Write the proportion equation
   105,868.57 : 158,868.69 = 65,965.90 : x
2. Step 2: Convert to fraction form
   105,868.57/158,868.69 = 65,965.90/x
3. Step 3: Cross multiply
   105,868.57x = 158,868.69 × 65,965.90
4. Step 4: Simplify right side
   105,868.57x = 10,479,916,117.67
5. Step 5: Solve for x
   x = 10,479,916,117.67/105,868.57
6. Step 6: Final answer
   x = 98,989.87