Finding the Fourth Proportional to 1,776.25, 2,665.01 and 1,288.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.25 : 2,665.01 = 1,288.45 : x
2. Step 2: Convert to fraction form
   1,776.25/2,665.01 = 1,288.45/x
3. Step 3: Cross multiply
   1,776.25x = 2,665.01 × 1,288.45
4. Step 4: Simplify right side
   1,776.25x = 3,433,732.13
5. Step 5: Solve for x
   x = 3,433,732.13/1,776.25
6. Step 6: Final answer
   x = 1,933.14