Finding the Fourth Proportional to 1,368.63, 2,051.33 and 978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.63 : 2,051.33 = 978.21 : x
2. Step 2: Convert to fraction form
   1,368.63/2,051.33 = 978.21/x
3. Step 3: Cross multiply
   1,368.63x = 2,051.33 × 978.21
4. Step 4: Simplify right side
   1,368.63x = 2,006,626.63
5. Step 5: Solve for x
   x = 2,006,626.63/1,368.63
6. Step 6: Final answer
   x = 1,466.16