Finding the Fourth Proportional to 105,641.82, 158,499.18 and 66,151.89

Step by Step Solution

1. Step 1: Write the proportion equation
   105,641.82 : 158,499.18 = 66,151.89 : x
2. Step 2: Convert to fraction form
   105,641.82/158,499.18 = 66,151.89/x
3. Step 3: Cross multiply
   105,641.82x = 158,499.18 × 66,151.89
4. Step 4: Simplify right side
   105,641.82x = 10,485,020,320.45
5. Step 5: Solve for x
   x = 10,485,020,320.45/105,641.82
6. Step 6: Final answer
   x = 99,250.66