Finding the Fourth Proportional to 159,491.30, 220,098.06 and 87,870.69

Step by Step Solution

1. Step 1: Write the proportion equation
   159,491.30 : 220,098.06 = 87,870.69 : x
2. Step 2: Convert to fraction form
   159,491.30/220,098.06 = 87,870.69/x
3. Step 3: Cross multiply
   159,491.30x = 220,098.06 × 87,870.69
4. Step 4: Simplify right side
   159,491.30x = 19,340,168,399.86
5. Step 5: Solve for x
   x = 19,340,168,399.86/159,491.30
6. Step 6: Final answer
   x = 121,261.59