Finding the Fourth Proportional to 105,499.68, 158,140.17 and 65,966.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105,499.68 : 158,140.17 = 65,966.01 : x
2. Step 2: Convert to fraction form
   105,499.68/158,140.17 = 65,966.01/x
3. Step 3: Cross multiply
   105,499.68x = 158,140.17 × 65,966.01
4. Step 4: Simplify right side
   105,499.68x = 10,431,876,035.62
5. Step 5: Solve for x
   x = 10,431,876,035.62/105,499.68
6. Step 6: Final answer
   x = 98,880.64