Finding the Fourth Proportional to 99.01, 148.17 and 90.27

Step by Step Solution

1. Step 1: Write the proportion equation
   99.01 : 148.17 = 90.27 : x
2. Step 2: Convert to fraction form
   99.01/148.17 = 90.27/x
3. Step 3: Cross multiply
   99.01x = 148.17 × 90.27
4. Step 4: Simplify right side
   99.01x = 13,375.31
5. Step 5: Solve for x
   x = 13,375.31/99.01
6. Step 6: Final answer
   x = 135.09