Finding the Third Proportional to 583,136.72 and 870,208.31

Step by Step Solution

1. Step 1: Write the proportion equation
   583,136.72 : 870,208.31 = 870,208.31 : x
2. Step 2: Convert to fraction form
   583,136.72/870,208.31 = 870,208.31/x
3. Step 3: Cross multiply
   583,136.72x = 870,208.31 × 870,208.31
4. Step 4: Simplify right side
   583,136.72x = 757,262,507,144.10
5. Step 5: Solve for x
   x = 757,262,507,144.10/583,136.72
6. Step 6: Final answer
   x = 1,298,602.00