Finding the Fourth Proportional to 7,448.49, 10,278.25 and 4,091.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,448.49 : 10,278.25 = 4,091.31 : x
2. Step 2: Convert to fraction form
   7,448.49/10,278.25 = 4,091.31/x
3. Step 3: Cross multiply
   7,448.49x = 10,278.25 × 4,091.31
4. Step 4: Simplify right side
   7,448.49x = 42,051,496.78
5. Step 5: Solve for x
   x = 42,051,496.78/7,448.49
6. Step 6: Final answer
   x = 5,645.64