Finding the Fourth Proportional to 1,630.10, 2,439.55 and 981.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,630.10 : 2,439.55 = 981.30 : x
2. Step 2: Convert to fraction form
   1,630.10/2,439.55 = 981.30/x
3. Step 3: Cross multiply
   1,630.10x = 2,439.55 × 981.30
4. Step 4: Simplify right side
   1,630.10x = 2,393,930.42
5. Step 5: Solve for x
   x = 2,393,930.42/1,630.10
6. Step 6: Final answer
   x = 1,468.58