Finding the Third Proportional to 540,912 and 840,856.50

Step by Step Solution

1. Step 1: Write the proportion equation
   540,912 : 840,856.50 = 840,856.50 : x
2. Step 2: Convert to fraction form
   540,912/840,856.50 = 840,856.50/x
3. Step 3: Cross multiply
   540,912x = 840,856.50 × 840,856.50
4. Step 4: Simplify right side
   540,912x = 707,039,653,592.25
5. Step 5: Solve for x
   x = 707,039,653,592.25/540,912
6. Step 6: Final answer
   x = 1,307,125.10