Finding the Third Proportional to 126,342 and 276,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   126,342 : 276,421.50 = 276,421.50 : x
2. Step 2: Convert to fraction form
   126,342/276,421.50 = 276,421.50/x
3. Step 3: Cross multiply
   126,342x = 276,421.50 × 276,421.50
4. Step 4: Simplify right side
   126,342x = 76,408,845,662.25
5. Step 5: Solve for x
   x = 76,408,845,662.25/126,342
6. Step 6: Final answer
   x = 604,777.87