Finding the Fourth Proportional to 1,369.60, 2,050.08 and 978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.60 : 2,050.08 = 978.34 : x
2. Step 2: Convert to fraction form
   1,369.60/2,050.08 = 978.34/x
3. Step 3: Cross multiply
   1,369.60x = 2,050.08 × 978.34
4. Step 4: Simplify right side
   1,369.60x = 2,005,675.27
5. Step 5: Solve for x
   x = 2,005,675.27/1,369.60
6. Step 6: Final answer
   x = 1,464.42