Finding the Third Proportional to 2,389.18 and 3,505.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.18 : 3,505.46 = 3,505.46 : x
2. Step 2: Convert to fraction form
   2,389.18/3,505.46 = 3,505.46/x
3. Step 3: Cross multiply
   2,389.18x = 3,505.46 × 3,505.46
4. Step 4: Simplify right side
   2,389.18x = 12,288,283.77
5. Step 5: Solve for x
   x = 12,288,283.77/2,389.18
6. Step 6: Final answer
   x = 5,143.30