Finding the Third Proportional to 201,039.55 and 418,417.52

Step by Step Solution

1. Step 1: Write the proportion equation
   201,039.55 : 418,417.52 = 418,417.52 : x
2. Step 2: Convert to fraction form
   201,039.55/418,417.52 = 418,417.52/x
3. Step 3: Cross multiply
   201,039.55x = 418,417.52 × 418,417.52
4. Step 4: Simplify right side
   201,039.55x = 175,073,223,919.57
5. Step 5: Solve for x
   x = 175,073,223,919.57/201,039.55
6. Step 6: Final answer
   x = 870,839.72