Finding the Fourth Proportional to 11,763.72, 17,648.10 and 3,972.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,763.72 : 17,648.10 = 3,972.36 : x
2. Step 2: Convert to fraction form
   11,763.72/17,648.10 = 3,972.36/x
3. Step 3: Cross multiply
   11,763.72x = 17,648.10 × 3,972.36
4. Step 4: Simplify right side
   11,763.72x = 70,104,606.52
5. Step 5: Solve for x
   x = 70,104,606.52/11,763.72
6. Step 6: Final answer
   x = 5,959.39