Finding the Fourth Proportional to 99.69, 149.52 and 67.40

Step by Step Solution

1. Step 1: Write the proportion equation
   99.69 : 149.52 = 67.40 : x
2. Step 2: Convert to fraction form
   99.69/149.52 = 67.40/x
3. Step 3: Cross multiply
   99.69x = 149.52 × 67.40
4. Step 4: Simplify right side
   99.69x = 10,077.71
5. Step 5: Solve for x
   x = 10,077.71/99.69
6. Step 6: Final answer
   x = 101.09