Finding the Third Proportional to 273,432 and 428,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   273,432 : 428,068.50 = 428,068.50 : x
2. Step 2: Convert to fraction form
   273,432/428,068.50 = 428,068.50/x
3. Step 3: Cross multiply
   273,432x = 428,068.50 × 428,068.50
4. Step 4: Simplify right side
   273,432x = 183,242,640,692.25
5. Step 5: Solve for x
   x = 183,242,640,692.25/273,432
6. Step 6: Final answer
   x = 670,157.99