Finding the Third Proportional to 288,940.50 and 425,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,940.50 : 425,047.50 = 425,047.50 : x
2. Step 2: Convert to fraction form
   288,940.50/425,047.50 = 425,047.50/x
3. Step 3: Cross multiply
   288,940.50x = 425,047.50 × 425,047.50
4. Step 4: Simplify right side
   288,940.50x = 180,665,377,256.25
5. Step 5: Solve for x
   x = 180,665,377,256.25/288,940.50
6. Step 6: Final answer
   x = 625,268.45