Finding the Fourth Proportional to 2,152.00, 3,228.11 and 612.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.00 : 3,228.11 = 612.88 : x
2. Step 2: Convert to fraction form
   2,152.00/3,228.11 = 612.88/x
3. Step 3: Cross multiply
   2,152.00x = 3,228.11 × 612.88
4. Step 4: Simplify right side
   2,152.00x = 1,978,429.45
5. Step 5: Solve for x
   x = 1,978,429.45/2,152.00
6. Step 6: Final answer
   x = 919.35