Finding the Fourth Proportional to 115,262.76, 159,056.46 and 64,280.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,262.76 : 159,056.46 = 64,280.72 : x
2. Step 2: Convert to fraction form
   115,262.76/159,056.46 = 64,280.72/x
3. Step 3: Cross multiply
   115,262.76x = 159,056.46 × 64,280.72
4. Step 4: Simplify right side
   115,262.76x = 10,224,263,769.45
5. Step 5: Solve for x
   x = 10,224,263,769.45/115,262.76
6. Step 6: Final answer
   x = 88,703.96