Finding the Fourth Proportional to 1,677.10, 2,314.29 and 978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.10 : 2,314.29 = 978.34 : x
2. Step 2: Convert to fraction form
   1,677.10/2,314.29 = 978.34/x
3. Step 3: Cross multiply
   1,677.10x = 2,314.29 × 978.34
4. Step 4: Simplify right side
   1,677.10x = 2,264,162.48
5. Step 5: Solve for x
   x = 2,264,162.48/1,677.10
6. Step 6: Final answer
   x = 1,350.05