Finding the Fourth Proportional to 4,200.72, 6,300.36 and 1,122

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200.72 : 6,300.36 = 1,122 : x
2. Step 2: Convert to fraction form
   4,200.72/6,300.36 = 1,122/x
3. Step 3: Cross multiply
   4,200.72x = 6,300.36 × 1,122
4. Step 4: Simplify right side
   4,200.72x = 7,069,003.92
5. Step 5: Solve for x
   x = 7,069,003.92/4,200.72
6. Step 6: Final answer
   x = 1,682.81