Finding the Fourth Proportional to 1,621.42, 2,237.42 and 1,200.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.42 : 2,237.42 = 1,200.42 : x
2. Step 2: Convert to fraction form
   1,621.42/2,237.42 = 1,200.42/x
3. Step 3: Cross multiply
   1,621.42x = 2,237.42 × 1,200.42
4. Step 4: Simplify right side
   1,621.42x = 2,685,846.72
5. Step 5: Solve for x
   x = 2,685,846.72/1,621.42
6. Step 6: Final answer
   x = 1,656.48