Finding the Fourth Proportional to 8,892.62, 12,277.54 and 5,707.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,892.62 : 12,277.54 = 5,707.29 : x
2. Step 2: Convert to fraction form
   8,892.62/12,277.54 = 5,707.29/x
3. Step 3: Cross multiply
   8,892.62x = 12,277.54 × 5,707.29
4. Step 4: Simplify right side
   8,892.62x = 70,071,481.27
5. Step 5: Solve for x
   x = 70,071,481.27/8,892.62
6. Step 6: Final answer
   x = 7,879.73