Finding the Third Proportional to 250,663.50 and 521,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,663.50 : 521,980.50 = 521,980.50 : x
2. Step 2: Convert to fraction form
   250,663.50/521,980.50 = 521,980.50/x
3. Step 3: Cross multiply
   250,663.50x = 521,980.50 × 521,980.50
4. Step 4: Simplify right side
   250,663.50x = 272,463,642,380.25
5. Step 5: Solve for x
   x = 272,463,642,380.25/250,663.50
6. Step 6: Final answer
   x = 1,086,969.75