Finding the Fourth Proportional to 99.57, 149.25 and 38.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99.57 : 149.25 = 38.69 : x
2. Step 2: Convert to fraction form
   99.57/149.25 = 38.69/x
3. Step 3: Cross multiply
   99.57x = 149.25 × 38.69
4. Step 4: Simplify right side
   99.57x = 5,774.48
5. Step 5: Solve for x
   x = 5,774.48/99.57
6. Step 6: Final answer
   x = 57.99