Finding the Third Proportional to 473,490 and 637,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   473,490 : 637,940.50 = 637,940.50 : x
2. Step 2: Convert to fraction form
   473,490/637,940.50 = 637,940.50/x
3. Step 3: Cross multiply
   473,490x = 637,940.50 × 637,940.50
4. Step 4: Simplify right side
   473,490x = 406,968,081,540.25
5. Step 5: Solve for x
   x = 406,968,081,540.25/473,490
6. Step 6: Final answer
   x = 859,507.24