Finding the Fourth Proportional to 1,368.42, 1,888.42 and 778.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.42 : 1,888.42 = 778.94 : x
2. Step 2: Convert to fraction form
   1,368.42/1,888.42 = 778.94/x
3. Step 3: Cross multiply
   1,368.42x = 1,888.42 × 778.94
4. Step 4: Simplify right side
   1,368.42x = 1,470,965.87
5. Step 5: Solve for x
   x = 1,470,965.87/1,368.42
6. Step 6: Final answer
   x = 1,074.94