Finding the Fourth Proportional to 10,149.86, 15,200.20 and 7,021.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,149.86 : 15,200.20 = 7,021.10 : x
2. Step 2: Convert to fraction form
   10,149.86/15,200.20 = 7,021.10/x
3. Step 3: Cross multiply
   10,149.86x = 15,200.20 × 7,021.10
4. Step 4: Simplify right side
   10,149.86x = 106,722,124.22
5. Step 5: Solve for x
   x = 106,722,124.22/10,149.86
6. Step 6: Final answer
   x = 10,514.64