Finding the Third Proportional to 59,428.69 and 123,790.78

Step by Step Solution

1. Step 1: Write the proportion equation
   59,428.69 : 123,790.78 = 123,790.78 : x
2. Step 2: Convert to fraction form
   59,428.69/123,790.78 = 123,790.78/x
3. Step 3: Cross multiply
   59,428.69x = 123,790.78 × 123,790.78
4. Step 4: Simplify right side
   59,428.69x = 15,324,157,522.49
5. Step 5: Solve for x
   x = 15,324,157,522.49/59,428.69
6. Step 6: Final answer
   x = 257,857.92