Finding the Third Proportional to 256,979.25 and 553,333.50

Step by Step Solution

1. Step 1: Write the proportion equation
   256,979.25 : 553,333.50 = 553,333.50 : x
2. Step 2: Convert to fraction form
   256,979.25/553,333.50 = 553,333.50/x
3. Step 3: Cross multiply
   256,979.25x = 553,333.50 × 553,333.50
4. Step 4: Simplify right side
   256,979.25x = 306,177,962,222.25
5. Step 5: Solve for x
   x = 306,177,962,222.25/256,979.25
6. Step 6: Final answer
   x = 1,191,450.14