Finding the Fourth Proportional to 99.88, 149.81 and 69.43

Step by Step Solution

1. Step 1: Write the proportion equation
   99.88 : 149.81 = 69.43 : x
2. Step 2: Convert to fraction form
   99.88/149.81 = 69.43/x
3. Step 3: Cross multiply
   99.88x = 149.81 × 69.43
4. Step 4: Simplify right side
   99.88x = 10,401.31
5. Step 5: Solve for x
   x = 10,401.31/99.88
6. Step 6: Final answer
   x = 104.14