Finding the Third Proportional to 145,695 and 317,026.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,695 : 317,026.50 = 317,026.50 : x
2. Step 2: Convert to fraction form
   145,695/317,026.50 = 317,026.50/x
3. Step 3: Cross multiply
   145,695x = 317,026.50 × 317,026.50
4. Step 4: Simplify right side
   145,695x = 100,505,801,702.25
5. Step 5: Solve for x
   x = 100,505,801,702.25/145,695
6. Step 6: Final answer
   x = 689,837.00