Finding the Fourth Proportional to 13,301.52, 19,959.24 and 8,620.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,301.52 : 19,959.24 = 8,620.34 : x
2. Step 2: Convert to fraction form
   13,301.52/19,959.24 = 8,620.34/x
3. Step 3: Cross multiply
   13,301.52x = 19,959.24 × 8,620.34
4. Step 4: Simplify right side
   13,301.52x = 172,055,335.15
5. Step 5: Solve for x
   x = 172,055,335.15/13,301.52
6. Step 6: Final answer
   x = 12,935.01