Finding the Fourth Proportional to 12,013.38, 18,007.31 and 7,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,013.38 : 18,007.31 = 7,085.34 : x
2. Step 2: Convert to fraction form
   12,013.38/18,007.31 = 7,085.34/x
3. Step 3: Cross multiply
   12,013.38x = 18,007.31 × 7,085.34
4. Step 4: Simplify right side
   12,013.38x = 127,587,931.55
5. Step 5: Solve for x
   x = 127,587,931.55/12,013.38
6. Step 6: Final answer
   x = 10,620.49