Finding the Fourth Proportional to 1,561.62, 2,156.04 and 1,002.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.62 : 2,156.04 = 1,002.33 : x
2. Step 2: Convert to fraction form
   1,561.62/2,156.04 = 1,002.33/x
3. Step 3: Cross multiply
   1,561.62x = 2,156.04 × 1,002.33
4. Step 4: Simplify right side
   1,561.62x = 2,161,063.57
5. Step 5: Solve for x
   x = 2,161,063.57/1,561.62
6. Step 6: Final answer
   x = 1,383.86