Finding the Third Proportional to 145,572 and 318,298.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,572 : 318,298.50 = 318,298.50 : x
2. Step 2: Convert to fraction form
   145,572/318,298.50 = 318,298.50/x
3. Step 3: Cross multiply
   145,572x = 318,298.50 × 318,298.50
4. Step 4: Simplify right side
   145,572x = 101,313,935,102.25
5. Step 5: Solve for x
   x = 101,313,935,102.25/145,572
6. Step 6: Final answer
   x = 695,971.31