Finding the Third Proportional to 317,178 and 683,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,178 : 683,869.50 = 683,869.50 : x
2. Step 2: Convert to fraction form
   317,178/683,869.50 = 683,869.50/x
3. Step 3: Cross multiply
   317,178x = 683,869.50 × 683,869.50
4. Step 4: Simplify right side
   317,178x = 467,677,493,030.25
5. Step 5: Solve for x
   x = 467,677,493,030.25/317,178
6. Step 6: Final answer
   x = 1,474,495.37