Finding the Third Proportional to 990,696 and 2,171,248

Step by Step Solution

1. Step 1: Write the proportion equation
   990,696 : 2,171,248 = 2,171,248 : x
2. Step 2: Convert to fraction form
   990,696/2,171,248 = 2,171,248/x
3. Step 3: Cross multiply
   990,696x = 2,171,248 × 2,171,248
4. Step 4: Simplify right side
   990,696x = 4,714,317,877,504
5. Step 5: Solve for x
   x = 4,714,317,877,504/990,696
6. Step 6: Final answer
   x = 4,758,591.82