Finding the Third Proportional to 272,394 and 422,758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   272,394 : 422,758.50 = 422,758.50 : x
2. Step 2: Convert to fraction form
   272,394/422,758.50 = 422,758.50/x
3. Step 3: Cross multiply
   272,394x = 422,758.50 × 422,758.50
4. Step 4: Simplify right side
   272,394x = 178,724,749,322.25
5. Step 5: Solve for x
   x = 178,724,749,322.25/272,394
6. Step 6: Final answer
   x = 656,125.87