Finding the Fourth Proportional to 10,587.25, 15,867.20 and 5,042.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,587.25 : 15,867.20 = 5,042.30 : x
2. Step 2: Convert to fraction form
   10,587.25/15,867.20 = 5,042.30/x
3. Step 3: Cross multiply
   10,587.25x = 15,867.20 × 5,042.30
4. Step 4: Simplify right side
   10,587.25x = 80,007,115.83
5. Step 5: Solve for x
   x = 80,007,115.83/10,587.25
6. Step 6: Final answer
   x = 7,556.93