Finding the Fourth Proportional to 1,368.12, 1,888.01 and 778.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.12 : 1,888.01 = 778.69 : x
2. Step 2: Convert to fraction form
   1,368.12/1,888.01 = 778.69/x
3. Step 3: Cross multiply
   1,368.12x = 1,888.01 × 778.69
4. Step 4: Simplify right side
   1,368.12x = 1,470,174.51
5. Step 5: Solve for x
   x = 1,470,174.51/1,368.12
6. Step 6: Final answer
   x = 1,074.59