Finding the Third Proportional to 66,842 and 89,199

Step by Step Solution

1. Step 1: Write the proportion equation
   66,842 : 89,199 = 89,199 : x
2. Step 2: Convert to fraction form
   66,842/89,199 = 89,199/x
3. Step 3: Cross multiply
   66,842x = 89,199 × 89,199
4. Step 4: Simplify right side
   66,842x = 7,956,461,601
5. Step 5: Solve for x
   x = 7,956,461,601/66,842
6. Step 6: Final answer
   x = 119,033.86