Finding the Fourth Proportional to 1,583.30, 2,184.78 and 920.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583.30 : 2,184.78 = 920.01 : x
2. Step 2: Convert to fraction form
   1,583.30/2,184.78 = 920.01/x
3. Step 3: Cross multiply
   1,583.30x = 2,184.78 × 920.01
4. Step 4: Simplify right side
   1,583.30x = 2,010,019.45
5. Step 5: Solve for x
   x = 2,010,019.45/1,583.30
6. Step 6: Final answer
   x = 1,269.52