Finding the Fourth Proportional to 1,003.39, 1,384.63 and 561.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.39 : 1,384.63 = 561.26 : x
2. Step 2: Convert to fraction form
   1,003.39/1,384.63 = 561.26/x
3. Step 3: Cross multiply
   1,003.39x = 1,384.63 × 561.26
4. Step 4: Simplify right side
   1,003.39x = 777,139.49
5. Step 5: Solve for x
   x = 777,139.49/1,003.39
6. Step 6: Final answer
   x = 774.52