Finding the Fourth Proportional to 1,369.49, 1,889.83 and 772.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.49 : 1,889.83 = 772.00 : x
2. Step 2: Convert to fraction form
   1,369.49/1,889.83 = 772.00/x
3. Step 3: Cross multiply
   1,369.49x = 1,889.83 × 772.00
4. Step 4: Simplify right side
   1,369.49x = 1,458,945.00
5. Step 5: Solve for x
   x = 1,458,945.00/1,369.49
6. Step 6: Final answer
   x = 1,065.32