Finding the Fourth Proportional to 1,368.41, 1,888.55 and 778.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.41 : 1,888.55 = 778.98 : x
2. Step 2: Convert to fraction form
   1,368.41/1,888.55 = 778.98/x
3. Step 3: Cross multiply
   1,368.41x = 1,888.55 × 778.98
4. Step 4: Simplify right side
   1,368.41x = 1,471,148.79
5. Step 5: Solve for x
   x = 1,471,148.79/1,368.41
6. Step 6: Final answer
   x = 1,075.08