Finding the Fourth Proportional to 109.45, 150.82 and 90.01

Step by Step Solution

1. Step 1: Write the proportion equation
   109.45 : 150.82 = 90.01 : x
2. Step 2: Convert to fraction form
   109.45/150.82 = 90.01/x
3. Step 3: Cross multiply
   109.45x = 150.82 × 90.01
4. Step 4: Simplify right side
   109.45x = 13,575.31
5. Step 5: Solve for x
   x = 13,575.31/109.45
6. Step 6: Final answer
   x = 124.03