Finding the Third Proportional to 458,559 and 611,575.50

Step by Step Solution

1. Step 1: Write the proportion equation
   458,559 : 611,575.50 = 611,575.50 : x
2. Step 2: Convert to fraction form
   458,559/611,575.50 = 611,575.50/x
3. Step 3: Cross multiply
   458,559x = 611,575.50 × 611,575.50
4. Step 4: Simplify right side
   458,559x = 374,024,592,200.25
5. Step 5: Solve for x
   x = 374,024,592,200.25/458,559
6. Step 6: Final answer
   x = 815,652.06