Finding the Fourth Proportional to 11,948.78, 17,921.15 and 3,626.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,948.78 : 17,921.15 = 3,626.80 : x
2. Step 2: Convert to fraction form
   11,948.78/17,921.15 = 3,626.80/x
3. Step 3: Cross multiply
   11,948.78x = 17,921.15 × 3,626.80
4. Step 4: Simplify right side
   11,948.78x = 64,996,426.82
5. Step 5: Solve for x
   x = 64,996,426.82/11,948.78
6. Step 6: Final answer
   x = 5,439.59