Finding the Fourth Proportional to 102.58, 141.41 and 72.98

Step by Step Solution

1. Step 1: Write the proportion equation
   102.58 : 141.41 = 72.98 : x
2. Step 2: Convert to fraction form
   102.58/141.41 = 72.98/x
3. Step 3: Cross multiply
   102.58x = 141.41 × 72.98
4. Step 4: Simplify right side
   102.58x = 10,320.10
5. Step 5: Solve for x
   x = 10,320.10/102.58
6. Step 6: Final answer
   x = 100.61