Finding the Third Proportional to 991,840 and 2,141,108

Step by Step Solution

1. Step 1: Write the proportion equation
   991,840 : 2,141,108 = 2,141,108 : x
2. Step 2: Convert to fraction form
   991,840/2,141,108 = 2,141,108/x
3. Step 3: Cross multiply
   991,840x = 2,141,108 × 2,141,108
4. Step 4: Simplify right side
   991,840x = 4,584,343,467,664
5. Step 5: Solve for x
   x = 4,584,343,467,664/991,840
6. Step 6: Final answer
   x = 4,622,059.47