Finding the Fourth Proportional to 13,499.48, 20,256.05 and 9,107.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.48 : 20,256.05 = 9,107.71 : x
2. Step 2: Convert to fraction form
   13,499.48/20,256.05 = 9,107.71/x
3. Step 3: Cross multiply
   13,499.48x = 20,256.05 × 9,107.71
4. Step 4: Simplify right side
   13,499.48x = 184,486,229.15
5. Step 5: Solve for x
   x = 184,486,229.15/13,499.48
6. Step 6: Final answer
   x = 13,666.17