Finding the Fourth Proportional to 99.43, 149.00 and 53.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99.43 : 149.00 = 53.69 : x
2. Step 2: Convert to fraction form
   99.43/149.00 = 53.69/x
3. Step 3: Cross multiply
   99.43x = 149.00 × 53.69
4. Step 4: Simplify right side
   99.43x = 7,998.80
5. Step 5: Solve for x
   x = 7,998.80/99.43
6. Step 6: Final answer
   x = 80.45