Finding the Fourth Proportional to 1,585.00, 2,188.17 and 1,054.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,585.00 : 2,188.17 = 1,054.29 : x
2. Step 2: Convert to fraction form
   1,585.00/2,188.17 = 1,054.29/x
3. Step 3: Cross multiply
   1,585.00x = 2,188.17 × 1,054.29
4. Step 4: Simplify right side
   1,585.00x = 2,306,949.54
5. Step 5: Solve for x
   x = 2,306,949.54/1,585.00
6. Step 6: Final answer
   x = 1,455.49