Finding the Fourth Proportional to 8,561.43, 12,837.29 and 5,101.11

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.43 : 12,837.29 = 5,101.11 : x
2. Step 2: Convert to fraction form
   8,561.43/12,837.29 = 5,101.11/x
3. Step 3: Cross multiply
   8,561.43x = 12,837.29 × 5,101.11
4. Step 4: Simplify right side
   8,561.43x = 65,484,402.89
5. Step 5: Solve for x
   x = 65,484,402.89/8,561.43
6. Step 6: Final answer
   x = 7,648.77