Finding the Fourth Proportional to 12,875.76, 17,771.16 and 7,288.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.76 : 17,771.16 = 7,288.56 : x
2. Step 2: Convert to fraction form
   12,875.76/17,771.16 = 7,288.56/x
3. Step 3: Cross multiply
   12,875.76x = 17,771.16 × 7,288.56
4. Step 4: Simplify right side
   12,875.76x = 129,526,165.93
5. Step 5: Solve for x
   x = 129,526,165.93/12,875.76
6. Step 6: Final answer
   x = 10,059.69