Finding the Fourth Proportional to 1,563.00, 2,155.82 and 899.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.00 : 2,155.82 = 899.61 : x
2. Step 2: Convert to fraction form
   1,563.00/2,155.82 = 899.61/x
3. Step 3: Cross multiply
   1,563.00x = 2,155.82 × 899.61
4. Step 4: Simplify right side
   1,563.00x = 1,939,384.65
5. Step 5: Solve for x
   x = 1,939,384.65/1,563.00
6. Step 6: Final answer
   x = 1,240.81