Finding the Third Proportional to 989,904 and 2,157,520

Step by Step Solution

1. Step 1: Write the proportion equation
   989,904 : 2,157,520 = 2,157,520 : x
2. Step 2: Convert to fraction form
   989,904/2,157,520 = 2,157,520/x
3. Step 3: Cross multiply
   989,904x = 2,157,520 × 2,157,520
4. Step 4: Simplify right side
   989,904x = 4,654,892,550,400
5. Step 5: Solve for x
   x = 4,654,892,550,400/989,904
6. Step 6: Final answer
   x = 4,702,367.65