Finding the Fourth Proportional to 1,583.31, 2,184.72 and 920.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583.31 : 2,184.72 = 920.03 : x
2. Step 2: Convert to fraction form
   1,583.31/2,184.72 = 920.03/x
3. Step 3: Cross multiply
   1,583.31x = 2,184.72 × 920.03
4. Step 4: Simplify right side
   1,583.31x = 2,010,007.94
5. Step 5: Solve for x
   x = 2,010,007.94/1,583.31
6. Step 6: Final answer
   x = 1,269.50