Finding the Fourth Proportional to 159,171.39, 219,687.72 and 91,233.90

Step by Step Solution

1. Step 1: Write the proportion equation
   159,171.39 : 219,687.72 = 91,233.90 : x
2. Step 2: Convert to fraction form
   159,171.39/219,687.72 = 91,233.90/x
3. Step 3: Cross multiply
   159,171.39x = 219,687.72 × 91,233.90
4. Step 4: Simplify right side
   159,171.39x = 20,042,967,477.71
5. Step 5: Solve for x
   x = 20,042,967,477.71/159,171.39
6. Step 6: Final answer
   x = 125,920.67