Finding the Third Proportional to 917,516 and 2,158,726

Step by Step Solution

1. Step 1: Write the proportion equation
   917,516 : 2,158,726 = 2,158,726 : x
2. Step 2: Convert to fraction form
   917,516/2,158,726 = 2,158,726/x
3. Step 3: Cross multiply
   917,516x = 2,158,726 × 2,158,726
4. Step 4: Simplify right side
   917,516x = 4,660,097,943,076
5. Step 5: Solve for x
   x = 4,660,097,943,076/917,516
6. Step 6: Final answer
   x = 5,079,037.25