Finding the Fourth Proportional to 100.98, 150.59 and 99.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.98 : 150.59 = 99.50 : x
2. Step 2: Convert to fraction form
   100.98/150.59 = 99.50/x
3. Step 3: Cross multiply
   100.98x = 150.59 × 99.50
4. Step 4: Simplify right side
   100.98x = 14,983.20
5. Step 5: Solve for x
   x = 14,983.20/100.98
6. Step 6: Final answer
   x = 148.38