Finding the Fourth Proportional to 99.57, 149.37 and 69.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99.57 : 149.37 = 69.06 : x
2. Step 2: Convert to fraction form
   99.57/149.37 = 69.06/x
3. Step 3: Cross multiply
   99.57x = 149.37 × 69.06
4. Step 4: Simplify right side
   99.57x = 10,315.49
5. Step 5: Solve for x
   x = 10,315.49/99.57
6. Step 6: Final answer
   x = 103.60