Finding the Third Proportional to 1,558.50 and 2,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.50 : 2,431.50 = 2,431.50 : x
2. Step 2: Convert to fraction form
   1,558.50/2,431.50 = 2,431.50/x
3. Step 3: Cross multiply
   1,558.50x = 2,431.50 × 2,431.50
4. Step 4: Simplify right side
   1,558.50x = 5,912,192.25
5. Step 5: Solve for x
   x = 5,912,192.25/1,558.50
6. Step 6: Final answer
   x = 3,793.51