Finding the Fourth Proportional to 106.31, 146.71 and 67.50

Step by Step Solution

1. Step 1: Write the proportion equation
   106.31 : 146.71 = 67.50 : x
2. Step 2: Convert to fraction form
   106.31/146.71 = 67.50/x
3. Step 3: Cross multiply
   106.31x = 146.71 × 67.50
4. Step 4: Simplify right side
   106.31x = 9,903.01
5. Step 5: Solve for x
   x = 9,903.01/106.31
6. Step 6: Final answer
   x = 93.15