Finding the Fourth Proportional to 1,594.56, 2,395.20 and 978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,594.56 : 2,395.20 = 978.56 : x
2. Step 2: Convert to fraction form
   1,594.56/2,395.20 = 978.56/x
3. Step 3: Cross multiply
   1,594.56x = 2,395.20 × 978.56
4. Step 4: Simplify right side
   1,594.56x = 2,343,846.91
5. Step 5: Solve for x
   x = 2,343,846.91/1,594.56
6. Step 6: Final answer
   x = 1,469.90