Finding the Fourth Proportional to 13,071.45, 18,034.63 and 7,405.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.45 : 18,034.63 = 7,405.30 : x
2. Step 2: Convert to fraction form
   13,071.45/18,034.63 = 7,405.30/x
3. Step 3: Cross multiply
   13,071.45x = 18,034.63 × 7,405.30
4. Step 4: Simplify right side
   13,071.45x = 133,551,849.57
5. Step 5: Solve for x
   x = 133,551,849.57/13,071.45
6. Step 6: Final answer
   x = 10,217.06