Finding the Third Proportional to 847,493.50 and 1,256,578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   847,493.50 : 1,256,578.50 = 1,256,578.50 : x
2. Step 2: Convert to fraction form
   847,493.50/1,256,578.50 = 1,256,578.50/x
3. Step 3: Cross multiply
   847,493.50x = 1,256,578.50 × 1,256,578.50
4. Step 4: Simplify right side
   847,493.50x = 1,578,989,526,662.25
5. Step 5: Solve for x
   x = 1,578,989,526,662.25/847,493.50
6. Step 6: Final answer
   x = 1,863,128.78