Finding the Fourth Proportional to 1,209.42, 1,669.61 and 1,136.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.42 : 1,669.61 = 1,136.52 : x
2. Step 2: Convert to fraction form
   1,209.42/1,669.61 = 1,136.52/x
3. Step 3: Cross multiply
   1,209.42x = 1,669.61 × 1,136.52
4. Step 4: Simplify right side
   1,209.42x = 1,897,548.00
5. Step 5: Solve for x
   x = 1,897,548.00/1,209.42
6. Step 6: Final answer
   x = 1,568.97