Finding the Third Proportional to 6,390 and 13,558.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,390 : 13,558.50 = 13,558.50 : x
2. Step 2: Convert to fraction form
   6,390/13,558.50 = 13,558.50/x
3. Step 3: Cross multiply
   6,390x = 13,558.50 × 13,558.50
4. Step 4: Simplify right side
   6,390x = 183,832,922.25
5. Step 5: Solve for x
   x = 183,832,922.25/6,390
6. Step 6: Final answer
   x = 28,768.85