Finding the Fourth Proportional to 17,564.72, 26,351.40 and 12,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,564.72 : 26,351.40 = 12,380.72 : x
2. Step 2: Convert to fraction form
   17,564.72/26,351.40 = 12,380.72/x
3. Step 3: Cross multiply
   17,564.72x = 26,351.40 × 12,380.72
4. Step 4: Simplify right side
   17,564.72x = 326,249,305.01
5. Step 5: Solve for x
   x = 326,249,305.01/17,564.72
6. Step 6: Final answer
   x = 18,574.13