Finding the Third Proportional to 272,310 and 406,824.75

Step by Step Solution

1. Step 1: Write the proportion equation
   272,310 : 406,824.75 = 406,824.75 : x
2. Step 2: Convert to fraction form
   272,310/406,824.75 = 406,824.75/x
3. Step 3: Cross multiply
   272,310x = 406,824.75 × 406,824.75
4. Step 4: Simplify right side
   272,310x = 165,506,377,212.56
5. Step 5: Solve for x
   x = 165,506,377,212.56/272,310
6. Step 6: Final answer
   x = 607,786.63