Finding the Fourth Proportional to 72.50, 99.94 and 49.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72.50 : 99.94 = 49.18 : x
2. Step 2: Convert to fraction form
   72.50/99.94 = 49.18/x
3. Step 3: Cross multiply
   72.50x = 99.94 × 49.18
4. Step 4: Simplify right side
   72.50x = 4,915.33
5. Step 5: Solve for x
   x = 4,915.33/72.50
6. Step 6: Final answer
   x = 67.79