Finding the Third Proportional to 525,538.50 and 801,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   525,538.50 : 801,430.50 = 801,430.50 : x
2. Step 2: Convert to fraction form
   525,538.50/801,430.50 = 801,430.50/x
3. Step 3: Cross multiply
   525,538.50x = 801,430.50 × 801,430.50
4. Step 4: Simplify right side
   525,538.50x = 642,290,846,330.25
5. Step 5: Solve for x
   x = 642,290,846,330.25/525,538.50
6. Step 6: Final answer
   x = 1,222,157.55