Finding the Fourth Proportional to 105,921.93, 158,921.82 and 99,662.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,921.93 : 158,921.82 = 99,662.25 : x
2. Step 2: Convert to fraction form
   105,921.93/158,921.82 = 99,662.25/x
3. Step 3: Cross multiply
   105,921.93x = 158,921.82 × 99,662.25
4. Step 4: Simplify right side
   105,921.93x = 15,838,506,155.30
5. Step 5: Solve for x
   x = 15,838,506,155.30/105,921.93
6. Step 6: Final answer
   x = 149,530.00