Finding the Fourth Proportional to 10,200.18, 15,297.90 and 2,805.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,200.18 : 15,297.90 = 2,805.22 : x
2. Step 2: Convert to fraction form
   10,200.18/15,297.90 = 2,805.22/x
3. Step 3: Cross multiply
   10,200.18x = 15,297.90 × 2,805.22
4. Step 4: Simplify right side
   10,200.18x = 42,913,983.64
5. Step 5: Solve for x
   x = 42,913,983.64/10,200.18
6. Step 6: Final answer
   x = 4,207.18