Finding the Fourth Proportional to 13,066.37, 18,031.82 and 7,402.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.37 : 18,031.82 = 7,402.28 : x
2. Step 2: Convert to fraction form
   13,066.37/18,031.82 = 7,402.28/x
3. Step 3: Cross multiply
   13,066.37x = 18,031.82 × 7,402.28
4. Step 4: Simplify right side
   13,066.37x = 133,476,580.55
5. Step 5: Solve for x
   x = 133,476,580.55/13,066.37
6. Step 6: Final answer
   x = 10,215.28