Finding the Fourth Proportional to 12,972.31, 17,902.70 and 7,383.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,972.31 : 17,902.70 = 7,383.31 : x
2. Step 2: Convert to fraction form
   12,972.31/17,902.70 = 7,383.31/x
3. Step 3: Cross multiply
   12,972.31x = 17,902.70 × 7,383.31
4. Step 4: Simplify right side
   12,972.31x = 132,181,147.02
5. Step 5: Solve for x
   x = 132,181,147.02/12,972.31
6. Step 6: Final answer
   x = 10,189.48