Finding the Third Proportional to 62,766 and 87,990

Step by Step Solution

1. Step 1: Write the proportion equation
   62,766 : 87,990 = 87,990 : x
2. Step 2: Convert to fraction form
   62,766/87,990 = 87,990/x
3. Step 3: Cross multiply
   62,766x = 87,990 × 87,990
4. Step 4: Simplify right side
   62,766x = 7,742,240,100
5. Step 5: Solve for x
   x = 7,742,240,100/62,766
6. Step 6: Final answer
   x = 123,350.86