Finding the Third Proportional to 249,258 and 543,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,258 : 543,631.50 = 543,631.50 : x
2. Step 2: Convert to fraction form
   249,258/543,631.50 = 543,631.50/x
3. Step 3: Cross multiply
   249,258x = 543,631.50 × 543,631.50
4. Step 4: Simplify right side
   249,258x = 295,535,207,792.25
5. Step 5: Solve for x
   x = 295,535,207,792.25/249,258
6. Step 6: Final answer
   x = 1,185,659.87