Finding the Third Proportional to 356,838.50 and 784,651.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,838.50 : 784,651.50 = 784,651.50 : x
2. Step 2: Convert to fraction form
   356,838.50/784,651.50 = 784,651.50/x
3. Step 3: Cross multiply
   356,838.50x = 784,651.50 × 784,651.50
4. Step 4: Simplify right side
   356,838.50x = 615,677,976,452.25
5. Step 5: Solve for x
   x = 615,677,976,452.25/356,838.50
6. Step 6: Final answer
   x = 1,725,368.69