Finding the Third Proportional to 911,288 and 2,129,180

Step by Step Solution

1. Step 1: Write the proportion equation
   911,288 : 2,129,180 = 2,129,180 : x
2. Step 2: Convert to fraction form
   911,288/2,129,180 = 2,129,180/x
3. Step 3: Cross multiply
   911,288x = 2,129,180 × 2,129,180
4. Step 4: Simplify right side
   911,288x = 4,533,407,472,400
5. Step 5: Solve for x
   x = 4,533,407,472,400/911,288
6. Step 6: Final answer
   x = 4,974,725.30