Finding the Third Proportional to 87,699 and 189,426

Step by Step Solution

1. Step 1: Write the proportion equation
   87,699 : 189,426 = 189,426 : x
2. Step 2: Convert to fraction form
   87,699/189,426 = 189,426/x
3. Step 3: Cross multiply
   87,699x = 189,426 × 189,426
4. Step 4: Simplify right side
   87,699x = 35,882,209,476
5. Step 5: Solve for x
   x = 35,882,209,476/87,699
6. Step 6: Final answer
   x = 409,151.87