Finding the Third Proportional to 1,991,963 and 4,321,696

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991,963 : 4,321,696 = 4,321,696 : x
2. Step 2: Convert to fraction form
   1,991,963/4,321,696 = 4,321,696/x
3. Step 3: Cross multiply
   1,991,963x = 4,321,696 × 4,321,696
4. Step 4: Simplify right side
   1,991,963x = 18,677,056,316,416
5. Step 5: Solve for x
   x = 18,677,056,316,416/1,991,963
6. Step 6: Final answer
   x = 9,376,206.44