Finding the Fourth Proportional to 83.69, 125.47 and 43.09

Step by Step Solution

1. Step 1: Write the proportion equation
   83.69 : 125.47 = 43.09 : x
2. Step 2: Convert to fraction form
   83.69/125.47 = 43.09/x
3. Step 3: Cross multiply
   83.69x = 125.47 × 43.09
4. Step 4: Simplify right side
   83.69x = 5,406.50
5. Step 5: Solve for x
   x = 5,406.50/83.69
6. Step 6: Final answer
   x = 64.60