Finding the Fourth Proportional to 1,404.60, 1,938.34 and 775.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.60 : 1,938.34 = 775.12 : x
2. Step 2: Convert to fraction form
   1,404.60/1,938.34 = 775.12/x
3. Step 3: Cross multiply
   1,404.60x = 1,938.34 × 775.12
4. Step 4: Simplify right side
   1,404.60x = 1,502,446.10
5. Step 5: Solve for x
   x = 1,502,446.10/1,404.60
6. Step 6: Final answer
   x = 1,069.66