Finding the Third Proportional to 147,559.50 and 316,623

Step by Step Solution

1. Step 1: Write the proportion equation
   147,559.50 : 316,623 = 316,623 : x
2. Step 2: Convert to fraction form
   147,559.50/316,623 = 316,623/x
3. Step 3: Cross multiply
   147,559.50x = 316,623 × 316,623
4. Step 4: Simplify right side
   147,559.50x = 100,250,124,129
5. Step 5: Solve for x
   x = 100,250,124,129/147,559.50
6. Step 6: Final answer
   x = 679,387.80