Finding the Fourth Proportional to 1,368.34, 1,888.36 and 778.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.34 : 1,888.36 = 778.96 : x
2. Step 2: Convert to fraction form
   1,368.34/1,888.36 = 778.96/x
3. Step 3: Cross multiply
   1,368.34x = 1,888.36 × 778.96
4. Step 4: Simplify right side
   1,368.34x = 1,470,956.91
5. Step 5: Solve for x
   x = 1,470,956.91/1,368.34
6. Step 6: Final answer
   x = 1,074.99