Finding the Third Proportional to 319,572 and 501,300

Step by Step Solution

1. Step 1: Write the proportion equation
   319,572 : 501,300 = 501,300 : x
2. Step 2: Convert to fraction form
   319,572/501,300 = 501,300/x
3. Step 3: Cross multiply
   319,572x = 501,300 × 501,300
4. Step 4: Simplify right side
   319,572x = 251,301,690,000
5. Step 5: Solve for x
   x = 251,301,690,000/319,572
6. Step 6: Final answer
   x = 786,369.55