Finding the Fourth Proportional to 1,404.77, 1,938.42 and 775.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.77 : 1,938.42 = 775.25 : x
2. Step 2: Convert to fraction form
   1,404.77/1,938.42 = 775.25/x
3. Step 3: Cross multiply
   1,404.77x = 1,938.42 × 775.25
4. Step 4: Simplify right side
   1,404.77x = 1,502,750.41
5. Step 5: Solve for x
   x = 1,502,750.41/1,404.77
6. Step 6: Final answer
   x = 1,069.75