Finding the Fourth Proportional to 99.61, 149.42 and 35.53

Step by Step Solution

1. Step 1: Write the proportion equation
   99.61 : 149.42 = 35.53 : x
2. Step 2: Convert to fraction form
   99.61/149.42 = 35.53/x
3. Step 3: Cross multiply
   99.61x = 149.42 × 35.53
4. Step 4: Simplify right side
   99.61x = 5,308.89
5. Step 5: Solve for x
   x = 5,308.89/99.61
6. Step 6: Final answer
   x = 53.30