Finding the Third Proportional to 5,430 and 12,454.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,430 : 12,454.50 = 12,454.50 : x
2. Step 2: Convert to fraction form
   5,430/12,454.50 = 12,454.50/x
3. Step 3: Cross multiply
   5,430x = 12,454.50 × 12,454.50
4. Step 4: Simplify right side
   5,430x = 155,114,570.25
5. Step 5: Solve for x
   x = 155,114,570.25/5,430
6. Step 6: Final answer
   x = 28,566.22