Finding the Fourth Proportional to 102.10, 152.42 and 72.98

Step by Step Solution

1. Step 1: Write the proportion equation
   102.10 : 152.42 = 72.98 : x
2. Step 2: Convert to fraction form
   102.10/152.42 = 72.98/x
3. Step 3: Cross multiply
   102.10x = 152.42 × 72.98
4. Step 4: Simplify right side
   102.10x = 11,123.61
5. Step 5: Solve for x
   x = 11,123.61/102.10
6. Step 6: Final answer
   x = 108.95