Finding the Third Proportional to 276,209 and 418,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,209 : 418,047.50 = 418,047.50 : x
2. Step 2: Convert to fraction form
   276,209/418,047.50 = 418,047.50/x
3. Step 3: Cross multiply
   276,209x = 418,047.50 × 418,047.50
4. Step 4: Simplify right side
   276,209x = 174,763,712,256.25
5. Step 5: Solve for x
   x = 174,763,712,256.25/276,209
6. Step 6: Final answer
   x = 632,722.73