Finding the Fourth Proportional to 17,665.12, 26,501.36 and 5,185.56

Step by Step Solution

1. Step 1: Write the proportion equation
   17,665.12 : 26,501.36 = 5,185.56 : x
2. Step 2: Convert to fraction form
   17,665.12/26,501.36 = 5,185.56/x
3. Step 3: Cross multiply
   17,665.12x = 26,501.36 × 5,185.56
4. Step 4: Simplify right side
   17,665.12x = 137,424,392.36
5. Step 5: Solve for x
   x = 137,424,392.36/17,665.12
6. Step 6: Final answer
   x = 7,779.42