Finding the Fourth Proportional to 1,711.03, 2,566.42 and 978.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,711.03 : 2,566.42 = 978.31 : x
2. Step 2: Convert to fraction form
   1,711.03/2,566.42 = 978.31/x
3. Step 3: Cross multiply
   1,711.03x = 2,566.42 × 978.31
4. Step 4: Simplify right side
   1,711.03x = 2,510,754.35
5. Step 5: Solve for x
   x = 2,510,754.35/1,711.03
6. Step 6: Final answer
   x = 1,467.39