Finding the Third Proportional to 208,120 and 442,156

Step by Step Solution

1. Step 1: Write the proportion equation
   208,120 : 442,156 = 442,156 : x
2. Step 2: Convert to fraction form
   208,120/442,156 = 442,156/x
3. Step 3: Cross multiply
   208,120x = 442,156 × 442,156
4. Step 4: Simplify right side
   208,120x = 195,501,928,336
5. Step 5: Solve for x
   x = 195,501,928,336/208,120
6. Step 6: Final answer
   x = 939,371.17