Finding the Third Proportional to 328,900.50 and 718,672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,900.50 : 718,672.50 = 718,672.50 : x
2. Step 2: Convert to fraction form
   328,900.50/718,672.50 = 718,672.50/x
3. Step 3: Cross multiply
   328,900.50x = 718,672.50 × 718,672.50
4. Step 4: Simplify right side
   328,900.50x = 516,490,162,256.25
5. Step 5: Solve for x
   x = 516,490,162,256.25/328,900.50
6. Step 6: Final answer
   x = 1,570,353.84