Finding the Third Proportional to 858,457.50 and 1,328,641.50

Step by Step Solution

1. Step 1: Write the proportion equation
   858,457.50 : 1,328,641.50 = 1,328,641.50 : x
2. Step 2: Convert to fraction form
   858,457.50/1,328,641.50 = 1,328,641.50/x
3. Step 3: Cross multiply
   858,457.50x = 1,328,641.50 × 1,328,641.50
4. Step 4: Simplify right side
   858,457.50x = 1,765,288,235,522.25
5. Step 5: Solve for x
   x = 1,765,288,235,522.25/858,457.50
6. Step 6: Final answer
   x = 2,056,349.02