Finding the Fourth Proportional to 115,870.20, 159,901.76 and 65,568.12

Step by Step Solution

1. Step 1: Write the proportion equation
   115,870.20 : 159,901.76 = 65,568.12 : x
2. Step 2: Convert to fraction form
   115,870.20/159,901.76 = 65,568.12/x
3. Step 3: Cross multiply
   115,870.20x = 159,901.76 × 65,568.12
4. Step 4: Simplify right side
   115,870.20x = 10,484,457,787.89
5. Step 5: Solve for x
   x = 10,484,457,787.89/115,870.20
6. Step 6: Final answer
   x = 90,484.51