Finding the Fourth Proportional to 1,485.56, 2,050.04 and 813.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.56 : 2,050.04 = 813.40 : x
2. Step 2: Convert to fraction form
   1,485.56/2,050.04 = 813.40/x
3. Step 3: Cross multiply
   1,485.56x = 2,050.04 × 813.40
4. Step 4: Simplify right side
   1,485.56x = 1,667,499.44
5. Step 5: Solve for x
   x = 1,667,499.44/1,485.56
6. Step 6: Final answer
   x = 1,122.47