Finding the Fourth Proportional to 1,583.38, 2,185.56 and 920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583.38 : 2,185.56 = 920.10 : x
2. Step 2: Convert to fraction form
   1,583.38/2,185.56 = 920.10/x
3. Step 3: Cross multiply
   1,583.38x = 2,185.56 × 920.10
4. Step 4: Simplify right side
   1,583.38x = 2,010,933.76
5. Step 5: Solve for x
   x = 2,010,933.76/1,583.38
6. Step 6: Final answer
   x = 1,270.03