Finding the Third Proportional to 145,434.50 and 314,216

Step by Step Solution

1. Step 1: Write the proportion equation
   145,434.50 : 314,216 = 314,216 : x
2. Step 2: Convert to fraction form
   145,434.50/314,216 = 314,216/x
3. Step 3: Cross multiply
   145,434.50x = 314,216 × 314,216
4. Step 4: Simplify right side
   145,434.50x = 98,731,694,656
5. Step 5: Solve for x
   x = 98,731,694,656/145,434.50
6. Step 6: Final answer
   x = 678,873.96