Finding the Fourth Proportional to 105,865.57, 158,864.19 and 65,962.90

Step by Step Solution

1. Step 1: Write the proportion equation
   105,865.57 : 158,864.19 = 65,962.90 : x
2. Step 2: Convert to fraction form
   105,865.57/158,864.19 = 65,962.90/x
3. Step 3: Cross multiply
   105,865.57x = 158,864.19 × 65,962.90
4. Step 4: Simplify right side
   105,865.57x = 10,479,142,678.55
5. Step 5: Solve for x
   x = 10,479,142,678.55/105,865.57
6. Step 6: Final answer
   x = 98,985.37