Finding the Fourth Proportional to 116.52, 160.76 and 64.76

Step by Step Solution

1. Step 1: Write the proportion equation
   116.52 : 160.76 = 64.76 : x
2. Step 2: Convert to fraction form
   116.52/160.76 = 64.76/x
3. Step 3: Cross multiply
   116.52x = 160.76 × 64.76
4. Step 4: Simplify right side
   116.52x = 10,410.82
5. Step 5: Solve for x
   x = 10,410.82/116.52
6. Step 6: Final answer
   x = 89.35