Finding the Fourth Proportional to 13,074.40, 19,618.89 and 7,230.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,074.40 : 19,618.89 = 7,230.25 : x
2. Step 2: Convert to fraction form
   13,074.40/19,618.89 = 7,230.25/x
3. Step 3: Cross multiply
   13,074.40x = 19,618.89 × 7,230.25
4. Step 4: Simplify right side
   13,074.40x = 141,849,479.42
5. Step 5: Solve for x
   x = 141,849,479.42/13,074.40
6. Step 6: Final answer
   x = 10,849.41