Finding the Third Proportional to 540,921 and 840,865.50

Step by Step Solution

1. Step 1: Write the proportion equation
   540,921 : 840,865.50 = 840,865.50 : x
2. Step 2: Convert to fraction form
   540,921/840,865.50 = 840,865.50/x
3. Step 3: Cross multiply
   540,921x = 840,865.50 × 840,865.50
4. Step 4: Simplify right side
   540,921x = 707,054,789,090.25
5. Step 5: Solve for x
   x = 707,054,789,090.25/540,921
6. Step 6: Final answer
   x = 1,307,131.34