Finding the Third Proportional to 113,869.50 and 243,506.50

Step by Step Solution

1. Step 1: Write the proportion equation
   113,869.50 : 243,506.50 = 243,506.50 : x
2. Step 2: Convert to fraction form
   113,869.50/243,506.50 = 243,506.50/x
3. Step 3: Cross multiply
   113,869.50x = 243,506.50 × 243,506.50
4. Step 4: Simplify right side
   113,869.50x = 59,295,415,542.25
5. Step 5: Solve for x
   x = 59,295,415,542.25/113,869.50
6. Step 6: Final answer
   x = 520,731.32