Finding the Fourth Proportional to 99.85, 149.78 and 69.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99.85 : 149.78 = 69.34 : x
2. Step 2: Convert to fraction form
   99.85/149.78 = 69.34/x
3. Step 3: Cross multiply
   99.85x = 149.78 × 69.34
4. Step 4: Simplify right side
   99.85x = 10,385.54
5. Step 5: Solve for x
   x = 10,385.54/99.85
6. Step 6: Final answer
   x = 104.01