Finding the Fourth Proportional to 10,215.61, 15,323.10 and 2,820.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.61 : 15,323.10 = 2,820.52 : x
2. Step 2: Convert to fraction form
   10,215.61/15,323.10 = 2,820.52/x
3. Step 3: Cross multiply
   10,215.61x = 15,323.10 × 2,820.52
4. Step 4: Simplify right side
   10,215.61x = 43,219,110.01
5. Step 5: Solve for x
   x = 43,219,110.01/10,215.61
6. Step 6: Final answer
   x = 4,230.69