Finding the Third Proportional to 528,617 and 851,154.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,617 : 851,154.50 = 851,154.50 : x
2. Step 2: Convert to fraction form
   528,617/851,154.50 = 851,154.50/x
3. Step 3: Cross multiply
   528,617x = 851,154.50 × 851,154.50
4. Step 4: Simplify right side
   528,617x = 724,463,982,870.25
5. Step 5: Solve for x
   x = 724,463,982,870.25/528,617
6. Step 6: Final answer
   x = 1,370,489.38