Finding the Third Proportional to 147,088 and 317,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,088 : 317,499.50 = 317,499.50 : x
2. Step 2: Convert to fraction form
   147,088/317,499.50 = 317,499.50/x
3. Step 3: Cross multiply
   147,088x = 317,499.50 × 317,499.50
4. Step 4: Simplify right side
   147,088x = 100,805,932,500.25
5. Step 5: Solve for x
   x = 100,805,932,500.25/147,088
6. Step 6: Final answer
   x = 685,344.37