Finding the Third Proportional to 560,868 and 870,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   560,868 : 870,109.50 = 870,109.50 : x
2. Step 2: Convert to fraction form
   560,868/870,109.50 = 870,109.50/x
3. Step 3: Cross multiply
   560,868x = 870,109.50 × 870,109.50
4. Step 4: Simplify right side
   560,868x = 757,090,541,990.25
5. Step 5: Solve for x
   x = 757,090,541,990.25/560,868
6. Step 6: Final answer
   x = 1,349,855.12