Finding the Third Proportional to 290,313 and 456,205.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,313 : 456,205.50 = 456,205.50 : x
2. Step 2: Convert to fraction form
   290,313/456,205.50 = 456,205.50/x
3. Step 3: Cross multiply
   290,313x = 456,205.50 × 456,205.50
4. Step 4: Simplify right side
   290,313x = 208,123,458,230.25
5. Step 5: Solve for x
   x = 208,123,458,230.25/290,313
6. Step 6: Final answer
   x = 716,893.35