Finding the Third Proportional to 231,960 and 355,428

Step by Step Solution

1. Step 1: Write the proportion equation
   231,960 : 355,428 = 355,428 : x
2. Step 2: Convert to fraction form
   231,960/355,428 = 355,428/x
3. Step 3: Cross multiply
   231,960x = 355,428 × 355,428
4. Step 4: Simplify right side
   231,960x = 126,329,063,184
5. Step 5: Solve for x
   x = 126,329,063,184/231,960
6. Step 6: Final answer
   x = 544,615.72