Finding the Third Proportional to 1,398.50 and 2,885.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.50 : 2,885.50 = 2,885.50 : x
2. Step 2: Convert to fraction form
   1,398.50/2,885.50 = 2,885.50/x
3. Step 3: Cross multiply
   1,398.50x = 2,885.50 × 2,885.50
4. Step 4: Simplify right side
   1,398.50x = 8,326,110.25
5. Step 5: Solve for x
   x = 8,326,110.25/1,398.50
6. Step 6: Final answer
   x = 5,953.60