Finding the Fourth Proportional to 105,631.82, 158,341.10 and 66,216.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,631.82 : 158,341.10 = 66,216.62 : x
2. Step 2: Convert to fraction form
   105,631.82/158,341.10 = 66,216.62/x
3. Step 3: Cross multiply
   105,631.82x = 158,341.10 × 66,216.62
4. Step 4: Simplify right side
   105,631.82x = 10,484,811,326.29
5. Step 5: Solve for x
   x = 10,484,811,326.29/105,631.82
6. Step 6: Final answer
   x = 99,258.08