Finding the Fourth Proportional to 13,066.32, 18,031.56 and 8,355.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.32 : 18,031.56 = 8,355.60 : x
2. Step 2: Convert to fraction form
   13,066.32/18,031.56 = 8,355.60/x
3. Step 3: Cross multiply
   13,066.32x = 18,031.56 × 8,355.60
4. Step 4: Simplify right side
   13,066.32x = 150,664,502.74
5. Step 5: Solve for x
   x = 150,664,502.74/13,066.32
6. Step 6: Final answer
   x = 11,530.75