Finding the Third Proportional to 2,140,999 and 2,916,172

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140,999 : 2,916,172 = 2,916,172 : x
2. Step 2: Convert to fraction form
   2,140,999/2,916,172 = 2,916,172/x
3. Step 3: Cross multiply
   2,140,999x = 2,916,172 × 2,916,172
4. Step 4: Simplify right side
   2,140,999x = 8,504,059,133,584
5. Step 5: Solve for x
   x = 8,504,059,133,584/2,140,999
6. Step 6: Final answer
   x = 3,972,005.19