Finding the Fourth Proportional to 99.69, 137.36 and 99.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99.69 : 137.36 = 99.69 : x
2. Step 2: Convert to fraction form
   99.69/137.36 = 99.69/x
3. Step 3: Cross multiply
   99.69x = 137.36 × 99.69
4. Step 4: Simplify right side
   99.69x = 13,692.92
5. Step 5: Solve for x
   x = 13,692.92/99.69
6. Step 6: Final answer
   x = 137.36