Finding the Fourth Proportional to 1,383.71, 2,075.56 and 561.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.71 : 2,075.56 = 561.98 : x
2. Step 2: Convert to fraction form
   1,383.71/2,075.56 = 561.98/x
3. Step 3: Cross multiply
   1,383.71x = 2,075.56 × 561.98
4. Step 4: Simplify right side
   1,383.71x = 1,166,418.02
5. Step 5: Solve for x
   x = 1,166,418.02/1,383.71
6. Step 6: Final answer
   x = 842.96