Finding the Fourth Proportional to 13,011.33, 17,951.43 and 7,970.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.33 : 17,951.43 = 7,970.31 : x
2. Step 2: Convert to fraction form
   13,011.33/17,951.43 = 7,970.31/x
3. Step 3: Cross multiply
   13,011.33x = 17,951.43 × 7,970.31
4. Step 4: Simplify right side
   13,011.33x = 143,078,462.04
5. Step 5: Solve for x
   x = 143,078,462.04/13,011.33
6. Step 6: Final answer
   x = 10,996.45