Finding the Third Proportional to 357,299 and 784,578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,299 : 784,578.50 = 784,578.50 : x
2. Step 2: Convert to fraction form
   357,299/784,578.50 = 784,578.50/x
3. Step 3: Cross multiply
   357,299x = 784,578.50 × 784,578.50
4. Step 4: Simplify right side
   357,299x = 615,563,422,662.25
5. Step 5: Solve for x
   x = 615,563,422,662.25/357,299
6. Step 6: Final answer
   x = 1,722,824.36