Finding the Third Proportional to 397,135.50 and 870,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,135.50 : 870,081.50 = 870,081.50 : x
2. Step 2: Convert to fraction form
   397,135.50/870,081.50 = 870,081.50/x
3. Step 3: Cross multiply
   397,135.50x = 870,081.50 × 870,081.50
4. Step 4: Simplify right side
   397,135.50x = 757,041,816,642.25
5. Step 5: Solve for x
   x = 757,041,816,642.25/397,135.50
6. Step 6: Final answer
   x = 1,906,255.72