Finding the Fourth Proportional to 1,561.62, 2,153.73 and 1,408.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.62 : 2,153.73 = 1,408.02 : x
2. Step 2: Convert to fraction form
   1,561.62/2,153.73 = 1,408.02/x
3. Step 3: Cross multiply
   1,561.62x = 2,153.73 × 1,408.02
4. Step 4: Simplify right side
   1,561.62x = 3,032,494.91
5. Step 5: Solve for x
   x = 3,032,494.91/1,561.62
6. Step 6: Final answer
   x = 1,941.89