Finding the Fourth Proportional to 1,563.15, 2,158.89 and 1,064.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.15 : 2,158.89 = 1,064.91 : x
2. Step 2: Convert to fraction form
   1,563.15/2,158.89 = 1,064.91/x
3. Step 3: Cross multiply
   1,563.15x = 2,158.89 × 1,064.91
4. Step 4: Simplify right side
   1,563.15x = 2,299,023.55
5. Step 5: Solve for x
   x = 2,299,023.55/1,563.15
6. Step 6: Final answer
   x = 1,470.76