Finding the Fourth Proportional to 8,917.82, 12,307.89 and 5,140.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,917.82 : 12,307.89 = 5,140.27 : x
2. Step 2: Convert to fraction form
   8,917.82/12,307.89 = 5,140.27/x
3. Step 3: Cross multiply
   8,917.82x = 12,307.89 × 5,140.27
4. Step 4: Simplify right side
   8,917.82x = 63,265,816.19
5. Step 5: Solve for x
   x = 63,265,816.19/8,917.82
6. Step 6: Final answer
   x = 7,094.31