Finding the Fourth Proportional to 115,378.72, 159,222.64 and 65,077.76

Step by Step Solution

1. Step 1: Write the proportion equation
   115,378.72 : 159,222.64 = 65,077.76 : x
2. Step 2: Convert to fraction form
   115,378.72/159,222.64 = 65,077.76/x
3. Step 3: Cross multiply
   115,378.72x = 159,222.64 × 65,077.76
4. Step 4: Simplify right side
   115,378.72x = 10,361,852,752.49
5. Step 5: Solve for x
   x = 10,361,852,752.49/115,378.72
6. Step 6: Final answer
   x = 89,807.31