Finding the Fourth Proportional to 1,677.06, 2,314.35 and 978.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.06 : 2,314.35 = 978.42 : x
2. Step 2: Convert to fraction form
   1,677.06/2,314.35 = 978.42/x
3. Step 3: Cross multiply
   1,677.06x = 2,314.35 × 978.42
4. Step 4: Simplify right side
   1,677.06x = 2,264,406.33
5. Step 5: Solve for x
   x = 2,264,406.33/1,677.06
6. Step 6: Final answer
   x = 1,350.22