Finding the Third Proportional to 71,298 and 99,685

Step by Step Solution

1. Step 1: Write the proportion equation
   71,298 : 99,685 = 99,685 : x
2. Step 2: Convert to fraction form
   71,298/99,685 = 99,685/x
3. Step 3: Cross multiply
   71,298x = 99,685 × 99,685
4. Step 4: Simplify right side
   71,298x = 9,937,099,225
5. Step 5: Solve for x
   x = 9,937,099,225/71,298
6. Step 6: Final answer
   x = 139,374.17