Finding the Third Proportional to 359,200 and 557,712

Step by Step Solution

1. Step 1: Write the proportion equation
   359,200 : 557,712 = 557,712 : x
2. Step 2: Convert to fraction form
   359,200/557,712 = 557,712/x
3. Step 3: Cross multiply
   359,200x = 557,712 × 557,712
4. Step 4: Simplify right side
   359,200x = 311,042,674,944
5. Step 5: Solve for x
   x = 311,042,674,944/359,200
6. Step 6: Final answer
   x = 865,931.72