Finding the Fourth Proportional to 1,003.36, 1,384.62 and 561.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.36 : 1,384.62 = 561.27 : x
2. Step 2: Convert to fraction form
   1,003.36/1,384.62 = 561.27/x
3. Step 3: Cross multiply
   1,003.36x = 1,384.62 × 561.27
4. Step 4: Simplify right side
   1,003.36x = 777,139.42
5. Step 5: Solve for x
   x = 777,139.42/1,003.36
6. Step 6: Final answer
   x = 774.54