Finding the Fourth Proportional to 13,101.21, 19,648.35 and 8,940.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,101.21 : 19,648.35 = 8,940.47 : x
2. Step 2: Convert to fraction form
   13,101.21/19,648.35 = 8,940.47/x
3. Step 3: Cross multiply
   13,101.21x = 19,648.35 × 8,940.47
4. Step 4: Simplify right side
   13,101.21x = 175,665,385.48
5. Step 5: Solve for x
   x = 175,665,385.48/13,101.21
6. Step 6: Final answer
   x = 13,408.33