Finding the Fourth Proportional to 10,662.91, 15,987.51 and 4,427.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,662.91 : 15,987.51 = 4,427.22 : x
2. Step 2: Convert to fraction form
   10,662.91/15,987.51 = 4,427.22/x
3. Step 3: Cross multiply
   10,662.91x = 15,987.51 × 4,427.22
4. Step 4: Simplify right side
   10,662.91x = 70,780,283.98
5. Step 5: Solve for x
   x = 70,780,283.98/10,662.91
6. Step 6: Final answer
   x = 6,637.99