Finding the Fourth Proportional to 16,663.52, 25,014.83 and 13,155.87

Step by Step Solution

1. Step 1: Write the proportion equation
   16,663.52 : 25,014.83 = 13,155.87 : x
2. Step 2: Convert to fraction form
   16,663.52/25,014.83 = 13,155.87/x
3. Step 3: Cross multiply
   16,663.52x = 25,014.83 × 13,155.87
4. Step 4: Simplify right side
   16,663.52x = 329,091,738.87
5. Step 5: Solve for x
   x = 329,091,738.87/16,663.52
6. Step 6: Final answer
   x = 19,749.23