Finding the Third Proportional to 123,054.19 and 289,731.94

Step by Step Solution

1. Step 1: Write the proportion equation
   123,054.19 : 289,731.94 = 289,731.94 : x
2. Step 2: Convert to fraction form
   123,054.19/289,731.94 = 289,731.94/x
3. Step 3: Cross multiply
   123,054.19x = 289,731.94 × 289,731.94
4. Step 4: Simplify right side
   123,054.19x = 83,944,595,607.50
5. Step 5: Solve for x
   x = 83,944,595,607.50/123,054.19
6. Step 6: Final answer
   x = 682,175.86