Finding the Fourth Proportional to 1,008.08, 1,510.74 and 978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.08 : 1,510.74 = 978.52 : x
2. Step 2: Convert to fraction form
   1,008.08/1,510.74 = 978.52/x
3. Step 3: Cross multiply
   1,008.08x = 1,510.74 × 978.52
4. Step 4: Simplify right side
   1,008.08x = 1,478,289.30
5. Step 5: Solve for x
   x = 1,478,289.30/1,008.08
6. Step 6: Final answer
   x = 1,466.44