Finding the Third Proportional to 2,140,979 and 3,131,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140,979 : 3,131,079.50 = 3,131,079.50 : x
2. Step 2: Convert to fraction form
   2,140,979/3,131,079.50 = 3,131,079.50/x
3. Step 3: Cross multiply
   2,140,979x = 3,131,079.50 × 3,131,079.50
4. Step 4: Simplify right side
   2,140,979x = 9,803,658,835,320.25
5. Step 5: Solve for x
   x = 9,803,658,835,320.25/2,140,979
6. Step 6: Final answer
   x = 4,579,054.18