Finding the Third Proportional to 277,293 and 428,167.50

Step by Step Solution

1. Step 1: Write the proportion equation
   277,293 : 428,167.50 = 428,167.50 : x
2. Step 2: Convert to fraction form
   277,293/428,167.50 = 428,167.50/x
3. Step 3: Cross multiply
   277,293x = 428,167.50 × 428,167.50
4. Step 4: Simplify right side
   277,293x = 183,327,408,056.25
5. Step 5: Solve for x
   x = 183,327,408,056.25/277,293
6. Step 6: Final answer
   x = 661,132.48