Finding the Third Proportional to 988,688 and 2,158,600

Step by Step Solution

1. Step 1: Write the proportion equation
   988,688 : 2,158,600 = 2,158,600 : x
2. Step 2: Convert to fraction form
   988,688/2,158,600 = 2,158,600/x
3. Step 3: Cross multiply
   988,688x = 2,158,600 × 2,158,600
4. Step 4: Simplify right side
   988,688x = 4,659,553,960,000
5. Step 5: Solve for x
   x = 4,659,553,960,000/988,688
6. Step 6: Final answer
   x = 4,712,865.90