Finding the Third Proportional to 286,689 and 400,981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,689 : 400,981.50 = 400,981.50 : x
2. Step 2: Convert to fraction form
   286,689/400,981.50 = 400,981.50/x
3. Step 3: Cross multiply
   286,689x = 400,981.50 × 400,981.50
4. Step 4: Simplify right side
   286,689x = 160,786,163,342.25
5. Step 5: Solve for x
   x = 160,786,163,342.25/286,689
6. Step 6: Final answer
   x = 560,838.27