Finding the Third Proportional to 399,064,369,403 and 826,415,817,519

Step by Step Solution

1. Step 1: Write the proportion equation
   399,064,369,403 : 826,415,817,519 = 826,415,817,519 : x
2. Step 2: Convert to fraction form
   399,064,369,403/826,415,817,519 = 826,415,817,519/x
3. Step 3: Cross multiply
   399,064,369,403x = 826,415,817,519 × 826,415,817,519
4. Step 4: Simplify right side
   399,064,369,403x = 682,963,103,445,597,097,558,016
5. Step 5: Solve for x
   x = 682,963,103,445,597,097,558,016/399,064,369,403
6. Step 6: Final answer
   x = 1,711,410,879,571.41