Finding the Fourth Proportional to 8,917.69, 12,306.38 and 5,140.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,917.69 : 12,306.38 = 5,140.83 : x
2. Step 2: Convert to fraction form
   8,917.69/12,306.38 = 5,140.83/x
3. Step 3: Cross multiply
   8,917.69x = 12,306.38 × 5,140.83
4. Step 4: Simplify right side
   8,917.69x = 63,265,043.42
5. Step 5: Solve for x
   x = 63,265,043.42/8,917.69
6. Step 6: Final answer
   x = 7,094.33