Finding the Third Proportional to 318,475.50 and 696,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,475.50 : 696,019.50 = 696,019.50 : x
2. Step 2: Convert to fraction form
   318,475.50/696,019.50 = 696,019.50/x
3. Step 3: Cross multiply
   318,475.50x = 696,019.50 × 696,019.50
4. Step 4: Simplify right side
   318,475.50x = 484,443,144,380.25
5. Step 5: Solve for x
   x = 484,443,144,380.25/318,475.50
6. Step 6: Final answer
   x = 1,521,131.59