Finding the Third Proportional to 147,450 and 316,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,450 : 316,405.50 = 316,405.50 : x
2. Step 2: Convert to fraction form
   147,450/316,405.50 = 316,405.50/x
3. Step 3: Cross multiply
   147,450x = 316,405.50 × 316,405.50
4. Step 4: Simplify right side
   147,450x = 100,112,440,430.25
5. Step 5: Solve for x
   x = 100,112,440,430.25/147,450
6. Step 6: Final answer
   x = 678,958.57