Finding the Fourth Proportional to 1,404.87, 1,938.71 and 766.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.87 : 1,938.71 = 766.81 : x
2. Step 2: Convert to fraction form
   1,404.87/1,938.71 = 766.81/x
3. Step 3: Cross multiply
   1,404.87x = 1,938.71 × 766.81
4. Step 4: Simplify right side
   1,404.87x = 1,486,622.22
5. Step 5: Solve for x
   x = 1,486,622.22/1,404.87
6. Step 6: Final answer
   x = 1,058.19