Finding the Third Proportional to 58,479,902,947 and 128,170,786,457

Step by Step Solution

1. Step 1: Write the proportion equation
   58,479,902,947 : 128,170,786,457 = 128,170,786,457 : x
2. Step 2: Convert to fraction form
   58,479,902,947/128,170,786,457 = 128,170,786,457/x
3. Step 3: Cross multiply
   58,479,902,947x = 128,170,786,457 × 128,170,786,457
4. Step 4: Simplify right side
   58,479,902,947x = 16,427,750,501,005,895,139,328
5. Step 5: Solve for x
   x = 16,427,750,501,005,895,139,328/58,479,902,947
6. Step 6: Final answer
   x = 280,912,752,469.76