Finding the Third Proportional to 870,705 and 1,345,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   870,705 : 1,345,405.50 = 1,345,405.50 : x
2. Step 2: Convert to fraction form
   870,705/1,345,405.50 = 1,345,405.50/x
3. Step 3: Cross multiply
   870,705x = 1,345,405.50 × 1,345,405.50
4. Step 4: Simplify right side
   870,705x = 1,810,115,959,430.25
5. Step 5: Solve for x
   x = 1,810,115,959,430.25/870,705
6. Step 6: Final answer
   x = 2,078,908.42