Finding the Fourth Proportional to 17,664.72, 26,502.38 and 7,129.32

Step by Step Solution

1. Step 1: Write the proportion equation
   17,664.72 : 26,502.38 = 7,129.32 : x
2. Step 2: Convert to fraction form
   17,664.72/26,502.38 = 7,129.32/x
3. Step 3: Cross multiply
   17,664.72x = 26,502.38 × 7,129.32
4. Step 4: Simplify right side
   17,664.72x = 188,943,947.78
5. Step 5: Solve for x
   x = 188,943,947.78/17,664.72
6. Step 6: Final answer
   x = 10,696.12