Finding the Fourth Proportional to 116.43, 160.72 and 74.98

Step by Step Solution

1. Step 1: Write the proportion equation
   116.43 : 160.72 = 74.98 : x
2. Step 2: Convert to fraction form
   116.43/160.72 = 74.98/x
3. Step 3: Cross multiply
   116.43x = 160.72 × 74.98
4. Step 4: Simplify right side
   116.43x = 12,050.79
5. Step 5: Solve for x
   x = 12,050.79/116.43
6. Step 6: Final answer
   x = 103.50