Finding the Third Proportional to 9,980 and 13,590

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980 : 13,590 = 13,590 : x
2. Step 2: Convert to fraction form
   9,980/13,590 = 13,590/x
3. Step 3: Cross multiply
   9,980x = 13,590 × 13,590
4. Step 4: Simplify right side
   9,980x = 184,688,100
5. Step 5: Solve for x
   x = 184,688,100/9,980
6. Step 6: Final answer
   x = 18,505.82