Finding the Fourth Proportional to 105,906.29, 158,895.89 and 66,417.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,906.29 : 158,895.89 = 66,417.17 : x
2. Step 2: Convert to fraction form
   105,906.29/158,895.89 = 66,417.17/x
3. Step 3: Cross multiply
   105,906.29x = 158,895.89 × 66,417.17
4. Step 4: Simplify right side
   105,906.29x = 10,553,415,338.43
5. Step 5: Solve for x
   x = 10,553,415,338.43/105,906.29
6. Step 6: Final answer
   x = 99,648.62