Finding the Third Proportional to 113,857.50 and 243,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   113,857.50 : 243,479.50 = 243,479.50 : x
2. Step 2: Convert to fraction form
   113,857.50/243,479.50 = 243,479.50/x
3. Step 3: Cross multiply
   113,857.50x = 243,479.50 × 243,479.50
4. Step 4: Simplify right side
   113,857.50x = 59,282,266,920.25
5. Step 5: Solve for x
   x = 59,282,266,920.25/113,857.50
6. Step 6: Final answer
   x = 520,670.72