Finding the Fourth Proportional to 80,819.40, 111,560.70 and 69,443.40

Step by Step Solution

1. Step 1: Write the proportion equation
   80,819.40 : 111,560.70 = 69,443.40 : x
2. Step 2: Convert to fraction form
   80,819.40/111,560.70 = 69,443.40/x
3. Step 3: Cross multiply
   80,819.40x = 111,560.70 × 69,443.40
4. Step 4: Simplify right side
   80,819.40x = 7,747,154,314.38
5. Step 5: Solve for x
   x = 7,747,154,314.38/80,819.40
6. Step 6: Final answer
   x = 95,857.61