Finding the Third Proportional to 528,864 and 771,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,864 : 771,139.50 = 771,139.50 : x
2. Step 2: Convert to fraction form
   528,864/771,139.50 = 771,139.50/x
3. Step 3: Cross multiply
   528,864x = 771,139.50 × 771,139.50
4. Step 4: Simplify right side
   528,864x = 594,656,128,460.25
5. Step 5: Solve for x
   x = 594,656,128,460.25/528,864
6. Step 6: Final answer
   x = 1,124,402.74