Finding the Third Proportional to 387,164.81 and 910,900.69

Step by Step Solution

1. Step 1: Write the proportion equation
   387,164.81 : 910,900.69 = 910,900.69 : x
2. Step 2: Convert to fraction form
   387,164.81/910,900.69 = 910,900.69/x
3. Step 3: Cross multiply
   387,164.81x = 910,900.69 × 910,900.69
4. Step 4: Simplify right side
   387,164.81x = 829,740,062,487.97
5. Step 5: Solve for x
   x = 829,740,062,487.97/387,164.81
6. Step 6: Final answer
   x = 2,143,118.47