Finding the Fourth Proportional to 11,509, 17,265.78 and 4,488.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,509 : 17,265.78 = 4,488.72 : x
2. Step 2: Convert to fraction form
   11,509/17,265.78 = 4,488.72/x
3. Step 3: Cross multiply
   11,509x = 17,265.78 × 4,488.72
4. Step 4: Simplify right side
   11,509x = 77,501,252.00
5. Step 5: Solve for x
   x = 77,501,252.00/11,509
6. Step 6: Final answer
   x = 6,733.97