Finding the Fourth Proportional to 13,363.63, 18,443.76 and 7,697.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,363.63 : 18,443.76 = 7,697.28 : x
2. Step 2: Convert to fraction form
   13,363.63/18,443.76 = 7,697.28/x
3. Step 3: Cross multiply
   13,363.63x = 18,443.76 × 7,697.28
4. Step 4: Simplify right side
   13,363.63x = 141,966,654.27
5. Step 5: Solve for x
   x = 141,966,654.27/13,363.63
6. Step 6: Final answer
   x = 10,623.36