Finding the Third Proportional to 358,957 and 555,743.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,957 : 555,743.50 = 555,743.50 : x
2. Step 2: Convert to fraction form
   358,957/555,743.50 = 555,743.50/x
3. Step 3: Cross multiply
   358,957x = 555,743.50 × 555,743.50
4. Step 4: Simplify right side
   358,957x = 308,850,837,792.25
5. Step 5: Solve for x
   x = 308,850,837,792.25/358,957
6. Step 6: Final answer
   x = 860,411.80