Finding the Fourth Proportional to 115,763.76, 159,754.59 and 64,776.60

Step by Step Solution

1. Step 1: Write the proportion equation
   115,763.76 : 159,754.59 = 64,776.60 : x
2. Step 2: Convert to fraction form
   115,763.76/159,754.59 = 64,776.60/x
3. Step 3: Cross multiply
   115,763.76x = 159,754.59 × 64,776.60
4. Step 4: Simplify right side
   115,763.76x = 10,348,359,174.59
5. Step 5: Solve for x
   x = 10,348,359,174.59/115,763.76
6. Step 6: Final answer
   x = 89,392.04