Finding the Fourth Proportional to 9,690.72, 13,347.73 and 7,448.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,690.72 : 13,347.73 = 7,448.31 : x
2. Step 2: Convert to fraction form
   9,690.72/13,347.73 = 7,448.31/x
3. Step 3: Cross multiply
   9,690.72x = 13,347.73 × 7,448.31
4. Step 4: Simplify right side
   9,690.72x = 99,418,030.84
5. Step 5: Solve for x
   x = 99,418,030.84/9,690.72
6. Step 6: Final answer
   x = 10,259.10