Finding the Fourth Proportional to 1,563.83, 2,158.86 and 974.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.83 : 2,158.86 = 974.55 : x
2. Step 2: Convert to fraction form
   1,563.83/2,158.86 = 974.55/x
3. Step 3: Cross multiply
   1,563.83x = 2,158.86 × 974.55
4. Step 4: Simplify right side
   1,563.83x = 2,103,917.01
5. Step 5: Solve for x
   x = 2,103,917.01/1,563.83
6. Step 6: Final answer
   x = 1,345.36