Finding the Fourth Proportional to 13,959.47, 21,043.83 and 13,031.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,959.47 : 21,043.83 = 13,031.52 : x
2. Step 2: Convert to fraction form
   13,959.47/21,043.83 = 13,031.52/x
3. Step 3: Cross multiply
   13,959.47x = 21,043.83 × 13,031.52
4. Step 4: Simplify right side
   13,959.47x = 274,233,091.52
5. Step 5: Solve for x
   x = 274,233,091.52/13,959.47
6. Step 6: Final answer
   x = 19,644.95