Finding the Third Proportional to 65,998.13 and 89,670.38

Step by Step Solution

1. Step 1: Write the proportion equation
   65,998.13 : 89,670.38 = 89,670.38 : x
2. Step 2: Convert to fraction form
   65,998.13/89,670.38 = 89,670.38/x
3. Step 3: Cross multiply
   65,998.13x = 89,670.38 × 89,670.38
4. Step 4: Simplify right side
   65,998.13x = 8,040,776,152.64
5. Step 5: Solve for x
   x = 8,040,776,152.64/65,998.13
6. Step 6: Final answer
   x = 121,833.40