Finding the Third Proportional to 1,390,880 and 2,931,203

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,880 : 2,931,203 = 2,931,203 : x
2. Step 2: Convert to fraction form
   1,390,880/2,931,203 = 2,931,203/x
3. Step 3: Cross multiply
   1,390,880x = 2,931,203 × 2,931,203
4. Step 4: Simplify right side
   1,390,880x = 8,591,951,027,209
5. Step 5: Solve for x
   x = 8,591,951,027,209/1,390,880
6. Step 6: Final answer
   x = 6,177,348.89