Finding the Fourth Proportional to 105,498.18, 158,137.92 and 65,964.51

Step by Step Solution

1. Step 1: Write the proportion equation
   105,498.18 : 158,137.92 = 65,964.51 : x
2. Step 2: Convert to fraction form
   105,498.18/158,137.92 = 65,964.51/x
3. Step 3: Cross multiply
   105,498.18x = 158,137.92 × 65,964.51
4. Step 4: Simplify right side
   105,498.18x = 10,431,490,405.22
5. Step 5: Solve for x
   x = 10,431,490,405.22/105,498.18
6. Step 6: Final answer
   x = 98,878.39