Finding the Fourth Proportional to 116.78, 174.78 and 73.48

Step by Step Solution

1. Step 1: Write the proportion equation
   116.78 : 174.78 = 73.48 : x
2. Step 2: Convert to fraction form
   116.78/174.78 = 73.48/x
3. Step 3: Cross multiply
   116.78x = 174.78 × 73.48
4. Step 4: Simplify right side
   116.78x = 12,842.83
5. Step 5: Solve for x
   x = 12,842.83/116.78
6. Step 6: Final answer
   x = 109.97