Finding the Fourth Proportional to 1,423.21, 2,118.24 and 1,409.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.21 : 2,118.24 = 1,409.53 : x
2. Step 2: Convert to fraction form
   1,423.21/2,118.24 = 1,409.53/x
3. Step 3: Cross multiply
   1,423.21x = 2,118.24 × 1,409.53
4. Step 4: Simplify right side
   1,423.21x = 2,985,715.78
5. Step 5: Solve for x
   x = 2,985,715.78/1,423.21
6. Step 6: Final answer
   x = 2,097.87