Finding the Third Proportional to 560,803.50 and 870,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   560,803.50 : 870,007.50 = 870,007.50 : x
2. Step 2: Convert to fraction form
   560,803.50/870,007.50 = 870,007.50/x
3. Step 3: Cross multiply
   560,803.50x = 870,007.50 × 870,007.50
4. Step 4: Simplify right side
   560,803.50x = 756,913,050,056.25
5. Step 5: Solve for x
   x = 756,913,050,056.25/560,803.50
6. Step 6: Final answer
   x = 1,349,693.88