Finding the Third Proportional to 65,642.50 and 72,410

Step by Step Solution

1. Step 1: Write the proportion equation
   65,642.50 : 72,410 = 72,410 : x
2. Step 2: Convert to fraction form
   65,642.50/72,410 = 72,410/x
3. Step 3: Cross multiply
   65,642.50x = 72,410 × 72,410
4. Step 4: Simplify right side
   65,642.50x = 5,243,208,100
5. Step 5: Solve for x
   x = 5,243,208,100/65,642.50
6. Step 6: Final answer
   x = 79,875.20