Finding the Third Proportional to 61,389 and 131,490

Step by Step Solution

1. Step 1: Write the proportion equation
   61,389 : 131,490 = 131,490 : x
2. Step 2: Convert to fraction form
   61,389/131,490 = 131,490/x
3. Step 3: Cross multiply
   61,389x = 131,490 × 131,490
4. Step 4: Simplify right side
   61,389x = 17,289,620,100
5. Step 5: Solve for x
   x = 17,289,620,100/61,389
6. Step 6: Final answer
   x = 281,640.36