Finding the Third Proportional to 1,387,058 and 2,176,431

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,058 : 2,176,431 = 2,176,431 : x
2. Step 2: Convert to fraction form
   1,387,058/2,176,431 = 2,176,431/x
3. Step 3: Cross multiply
   1,387,058x = 2,176,431 × 2,176,431
4. Step 4: Simplify right side
   1,387,058x = 4,736,851,897,761
5. Step 5: Solve for x
   x = 4,736,851,897,761/1,387,058
6. Step 6: Final answer
   x = 3,415,035.20