Finding the Third Proportional to 917,520 and 2,158,738.50

Step by Step Solution

1. Step 1: Write the proportion equation
   917,520 : 2,158,738.50 = 2,158,738.50 : x
2. Step 2: Convert to fraction form
   917,520/2,158,738.50 = 2,158,738.50/x
3. Step 3: Cross multiply
   917,520x = 2,158,738.50 × 2,158,738.50
4. Step 4: Simplify right side
   917,520x = 4,660,151,911,382.25
5. Step 5: Solve for x
   x = 4,660,151,911,382.25/917,520
6. Step 6: Final answer
   x = 5,079,073.93