Finding the Fourth Proportional to 19,031.49, 28,543.59 and 5,177.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,031.49 : 28,543.59 = 5,177.25 : x
2. Step 2: Convert to fraction form
   19,031.49/28,543.59 = 5,177.25/x
3. Step 3: Cross multiply
   19,031.49x = 28,543.59 × 5,177.25
4. Step 4: Simplify right side
   19,031.49x = 147,777,301.33
5. Step 5: Solve for x
   x = 147,777,301.33/19,031.49
6. Step 6: Final answer
   x = 7,764.88