Finding the Third Proportional to 712,240 and 1,681,312

Step by Step Solution

1. Step 1: Write the proportion equation
   712,240 : 1,681,312 = 1,681,312 : x
2. Step 2: Convert to fraction form
   712,240/1,681,312 = 1,681,312/x
3. Step 3: Cross multiply
   712,240x = 1,681,312 × 1,681,312
4. Step 4: Simplify right side
   712,240x = 2,826,810,041,344
5. Step 5: Solve for x
   x = 2,826,810,041,344/712,240
6. Step 6: Final answer
   x = 3,968,900.99