Finding the Third Proportional to 59,178 and 91,809

Step by Step Solution

1. Step 1: Write the proportion equation
   59,178 : 91,809 = 91,809 : x
2. Step 2: Convert to fraction form
   59,178/91,809 = 91,809/x
3. Step 3: Cross multiply
   59,178x = 91,809 × 91,809
4. Step 4: Simplify right side
   59,178x = 8,428,892,481
5. Step 5: Solve for x
   x = 8,428,892,481/59,178
6. Step 6: Final answer
   x = 142,432.87