Finding the Third Proportional to 3,386.63 and 8,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,386.63 : 8,158.50 = 8,158.50 : x
2. Step 2: Convert to fraction form
   3,386.63/8,158.50 = 8,158.50/x
3. Step 3: Cross multiply
   3,386.63x = 8,158.50 × 8,158.50
4. Step 4: Simplify right side
   3,386.63x = 66,561,122.25
5. Step 5: Solve for x
   x = 66,561,122.25/3,386.63
6. Step 6: Final answer
   x = 19,654.12