Finding the Fourth Proportional to 100.82, 150.88 and 69.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 150.88 = 69.98 : x
2. Step 2: Convert to fraction form
   100.82/150.88 = 69.98/x
3. Step 3: Cross multiply
   100.82x = 150.88 × 69.98
4. Step 4: Simplify right side
   100.82x = 10,557.83
5. Step 5: Solve for x
   x = 10,557.83/100.82
6. Step 6: Final answer
   x = 104.72