Finding the Third Proportional to 388,836 and 588,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,836 : 588,685.50 = 588,685.50 : x
2. Step 2: Convert to fraction form
   388,836/588,685.50 = 588,685.50/x
3. Step 3: Cross multiply
   388,836x = 588,685.50 × 588,685.50
4. Step 4: Simplify right side
   388,836x = 346,550,617,910.25
5. Step 5: Solve for x
   x = 346,550,617,910.25/388,836
6. Step 6: Final answer
   x = 891,251.37