Finding the Third Proportional to 368,344.50 and 553,890

Step by Step Solution

1. Step 1: Write the proportion equation
   368,344.50 : 553,890 = 553,890 : x
2. Step 2: Convert to fraction form
   368,344.50/553,890 = 553,890/x
3. Step 3: Cross multiply
   368,344.50x = 553,890 × 553,890
4. Step 4: Simplify right side
   368,344.50x = 306,794,132,100
5. Step 5: Solve for x
   x = 306,794,132,100/368,344.50
6. Step 6: Final answer
   x = 832,899.99