Finding the Third Proportional to 989,764 and 2,156,168

Step by Step Solution

1. Step 1: Write the proportion equation
   989,764 : 2,156,168 = 2,156,168 : x
2. Step 2: Convert to fraction form
   989,764/2,156,168 = 2,156,168/x
3. Step 3: Cross multiply
   989,764x = 2,156,168 × 2,156,168
4. Step 4: Simplify right side
   989,764x = 4,649,060,444,224
5. Step 5: Solve for x
   x = 4,649,060,444,224/989,764
6. Step 6: Final answer
   x = 4,697,140.37