Finding the Fourth Proportional to 105,862.57, 158,859.69 and 65,959.90

Step by Step Solution

1. Step 1: Write the proportion equation
   105,862.57 : 158,859.69 = 65,959.90 : x
2. Step 2: Convert to fraction form
   105,862.57/158,859.69 = 65,959.90/x
3. Step 3: Cross multiply
   105,862.57x = 158,859.69 × 65,959.90
4. Step 4: Simplify right side
   105,862.57x = 10,478,369,266.43
5. Step 5: Solve for x
   x = 10,478,369,266.43/105,862.57
6. Step 6: Final answer
   x = 98,980.87