Finding the Fourth Proportional to 2,136.42, 3,200.37 and 1,403.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.42 : 3,200.37 = 1,403.78 : x
2. Step 2: Convert to fraction form
   2,136.42/3,200.37 = 1,403.78/x
3. Step 3: Cross multiply
   2,136.42x = 3,200.37 × 1,403.78
4. Step 4: Simplify right side
   2,136.42x = 4,492,599.40
5. Step 5: Solve for x
   x = 4,492,599.40/2,136.42
6. Step 6: Final answer
   x = 2,102.86