Finding the Third Proportional to 319,068.50 and 493,988

Step by Step Solution

1. Step 1: Write the proportion equation
   319,068.50 : 493,988 = 493,988 : x
2. Step 2: Convert to fraction form
   319,068.50/493,988 = 493,988/x
3. Step 3: Cross multiply
   319,068.50x = 493,988 × 493,988
4. Step 4: Simplify right side
   319,068.50x = 244,024,144,144
5. Step 5: Solve for x
   x = 244,024,144,144/319,068.50
6. Step 6: Final answer
   x = 764,801.74