Finding the Fourth Proportional to 105,588.88, 158,631 and 99,610.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,588.88 : 158,631 = 99,610.96 : x
2. Step 2: Convert to fraction form
   105,588.88/158,631 = 99,610.96/x
3. Step 3: Cross multiply
   105,588.88x = 158,631 × 99,610.96
4. Step 4: Simplify right side
   105,588.88x = 15,801,386,195.76
5. Step 5: Solve for x
   x = 15,801,386,195.76/105,588.88
6. Step 6: Final answer
   x = 149,650.10