Finding the Third Proportional to 988,460 and 2,158,172

Step by Step Solution

1. Step 1: Write the proportion equation
   988,460 : 2,158,172 = 2,158,172 : x
2. Step 2: Convert to fraction form
   988,460/2,158,172 = 2,158,172/x
3. Step 3: Cross multiply
   988,460x = 2,158,172 × 2,158,172
4. Step 4: Simplify right side
   988,460x = 4,657,706,381,584
5. Step 5: Solve for x
   x = 4,657,706,381,584/988,460
6. Step 6: Final answer
   x = 4,712,083.83