Finding the Fourth Proportional to 13,155.50, 19,733.28 and 3,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.50 : 19,733.28 = 3,921.50 : x
2. Step 2: Convert to fraction form
   13,155.50/19,733.28 = 3,921.50/x
3. Step 3: Cross multiply
   13,155.50x = 19,733.28 × 3,921.50
4. Step 4: Simplify right side
   13,155.50x = 77,384,057.52
5. Step 5: Solve for x
   x = 77,384,057.52/13,155.50
6. Step 6: Final answer
   x = 5,882.26