Finding the Fourth Proportional to 1,561.02, 2,154.17 and 862.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.02 : 2,154.17 = 862.38 : x
2. Step 2: Convert to fraction form
   1,561.02/2,154.17 = 862.38/x
3. Step 3: Cross multiply
   1,561.02x = 2,154.17 × 862.38
4. Step 4: Simplify right side
   1,561.02x = 1,857,713.12
5. Step 5: Solve for x
   x = 1,857,713.12/1,561.02
6. Step 6: Final answer
   x = 1,190.06