Finding the Fourth Proportional to 1,404.98, 1,938.94 and 775.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.98 : 1,938.94 = 775.58 : x
2. Step 2: Convert to fraction form
   1,404.98/1,938.94 = 775.58/x
3. Step 3: Cross multiply
   1,404.98x = 1,938.94 × 775.58
4. Step 4: Simplify right side
   1,404.98x = 1,503,791.45
5. Step 5: Solve for x
   x = 1,503,791.45/1,404.98
6. Step 6: Final answer
   x = 1,070.33