Finding the Third Proportional to 363,532 and 555,139

Step by Step Solution

1. Step 1: Write the proportion equation
   363,532 : 555,139 = 555,139 : x
2. Step 2: Convert to fraction form
   363,532/555,139 = 555,139/x
3. Step 3: Cross multiply
   363,532x = 555,139 × 555,139
4. Step 4: Simplify right side
   363,532x = 308,179,309,321
5. Step 5: Solve for x
   x = 308,179,309,321/363,532
6. Step 6: Final answer
   x = 847,736.40