Finding the Fourth Proportional to 1,485.05, 2,228.00 and 511.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.05 : 2,228.00 = 511.25 : x
2. Step 2: Convert to fraction form
   1,485.05/2,228.00 = 511.25/x
3. Step 3: Cross multiply
   1,485.05x = 2,228.00 × 511.25
4. Step 4: Simplify right side
   1,485.05x = 1,139,051.30
5. Step 5: Solve for x
   x = 1,139,051.30/1,485.05
6. Step 6: Final answer
   x = 767.01