Finding the Fourth Proportional to 12,883.59, 17,779.40 and 7,509.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,883.59 : 17,779.40 = 7,509.21 : x
2. Step 2: Convert to fraction form
   12,883.59/17,779.40 = 7,509.21/x
3. Step 3: Cross multiply
   12,883.59x = 17,779.40 × 7,509.21
4. Step 4: Simplify right side
   12,883.59x = 133,509,238.89
5. Step 5: Solve for x
   x = 133,509,238.89/12,883.59
6. Step 6: Final answer
   x = 10,362.73