Finding the Third Proportional to 147,555.50 and 316,616

Step by Step Solution

1. Step 1: Write the proportion equation
   147,555.50 : 316,616 = 316,616 : x
2. Step 2: Convert to fraction form
   147,555.50/316,616 = 316,616/x
3. Step 3: Cross multiply
   147,555.50x = 316,616 × 316,616
4. Step 4: Simplify right side
   147,555.50x = 100,245,691,456
5. Step 5: Solve for x
   x = 100,245,691,456/147,555.50
6. Step 6: Final answer
   x = 679,376.18