Finding the Fourth Proportional to 19,144.49, 28,713.50 and 5,290.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,144.49 : 28,713.50 = 5,290.25 : x
2. Step 2: Convert to fraction form
   19,144.49/28,713.50 = 5,290.25/x
3. Step 3: Cross multiply
   19,144.49x = 28,713.50 × 5,290.25
4. Step 4: Simplify right side
   19,144.49x = 151,901,566.92
5. Step 5: Solve for x
   x = 151,901,566.92/19,144.49
6. Step 6: Final answer
   x = 7,934.48