Finding the Third Proportional to 356,953.50 and 553,554

Step by Step Solution

1. Step 1: Write the proportion equation
   356,953.50 : 553,554 = 553,554 : x
2. Step 2: Convert to fraction form
   356,953.50/553,554 = 553,554/x
3. Step 3: Cross multiply
   356,953.50x = 553,554 × 553,554
4. Step 4: Simplify right side
   356,953.50x = 306,422,030,916
5. Step 5: Solve for x
   x = 306,422,030,916/356,953.50
6. Step 6: Final answer
   x = 858,436.83