Finding the Fourth Proportional to 3,059.31, 4,589.29 and 978.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,059.31 : 4,589.29 = 978.57 : x
2. Step 2: Convert to fraction form
   3,059.31/4,589.29 = 978.57/x
3. Step 3: Cross multiply
   3,059.31x = 4,589.29 × 978.57
4. Step 4: Simplify right side
   3,059.31x = 4,490,941.52
5. Step 5: Solve for x
   x = 4,490,941.52/3,059.31
6. Step 6: Final answer
   x = 1,467.96