Finding the Third Proportional to 540,891 and 840,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   540,891 : 840,820.50 = 840,820.50 : x
2. Step 2: Convert to fraction form
   540,891/840,820.50 = 840,820.50/x
3. Step 3: Cross multiply
   540,891x = 840,820.50 × 840,820.50
4. Step 4: Simplify right side
   540,891x = 706,979,113,220.25
5. Step 5: Solve for x
   x = 706,979,113,220.25/540,891
6. Step 6: Final answer
   x = 1,307,063.92