Finding the Third Proportional to 403,417.50 and 548,172

Step by Step Solution

1. Step 1: Write the proportion equation
   403,417.50 : 548,172 = 548,172 : x
2. Step 2: Convert to fraction form
   403,417.50/548,172 = 548,172/x
3. Step 3: Cross multiply
   403,417.50x = 548,172 × 548,172
4. Step 4: Simplify right side
   403,417.50x = 300,492,541,584
5. Step 5: Solve for x
   x = 300,492,541,584/403,417.50
6. Step 6: Final answer
   x = 744,867.39