Finding the Third Proportional to 5,580 and 12,118.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,580 : 12,118.50 = 12,118.50 : x
2. Step 2: Convert to fraction form
   5,580/12,118.50 = 12,118.50/x
3. Step 3: Cross multiply
   5,580x = 12,118.50 × 12,118.50
4. Step 4: Simplify right side
   5,580x = 146,858,042.25
5. Step 5: Solve for x
   x = 146,858,042.25/5,580
6. Step 6: Final answer
   x = 26,318.65