Finding the Fourth Proportional to 105,498.68, 158,138.64 and 65,965.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,498.68 : 158,138.64 = 65,965.04 : x
2. Step 2: Convert to fraction form
   105,498.68/158,138.64 = 65,965.04/x
3. Step 3: Cross multiply
   105,498.68x = 158,138.64 × 65,965.04
4. Step 4: Simplify right side
   105,498.68x = 10,431,621,713.15
5. Step 5: Solve for x
   x = 10,431,621,713.15/105,498.68
6. Step 6: Final answer
   x = 98,879.17