Finding the Third Proportional to 1,390,877 and 2,931,199

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,877 : 2,931,199 = 2,931,199 : x
2. Step 2: Convert to fraction form
   1,390,877/2,931,199 = 2,931,199/x
3. Step 3: Cross multiply
   1,390,877x = 2,931,199 × 2,931,199
4. Step 4: Simplify right side
   1,390,877x = 8,591,927,577,601
5. Step 5: Solve for x
   x = 8,591,927,577,601/1,390,877
6. Step 6: Final answer
   x = 6,177,345.36