Finding the Third Proportional to 61,114.50 and 81,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,114.50 : 81,121.50 = 81,121.50 : x
2. Step 2: Convert to fraction form
   61,114.50/81,121.50 = 81,121.50/x
3. Step 3: Cross multiply
   61,114.50x = 81,121.50 × 81,121.50
4. Step 4: Simplify right side
   61,114.50x = 6,580,697,762.25
5. Step 5: Solve for x
   x = 6,580,697,762.25/61,114.50
6. Step 6: Final answer
   x = 107,678.17