Finding the Fourth Proportional to 98.23, 146.72 and 83.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98.23 : 146.72 = 83.72 : x
2. Step 2: Convert to fraction form
   98.23/146.72 = 83.72/x
3. Step 3: Cross multiply
   98.23x = 146.72 × 83.72
4. Step 4: Simplify right side
   98.23x = 12,283.40
5. Step 5: Solve for x
   x = 12,283.40/98.23
6. Step 6: Final answer
   x = 125.05