Finding the Third Proportional to 111,678.75 and 243,435.38

Step by Step Solution

1. Step 1: Write the proportion equation
   111,678.75 : 243,435.38 = 243,435.38 : x
2. Step 2: Convert to fraction form
   111,678.75/243,435.38 = 243,435.38/x
3. Step 3: Cross multiply
   111,678.75x = 243,435.38 × 243,435.38
4. Step 4: Simplify right side
   111,678.75x = 59,260,781,801.39
5. Step 5: Solve for x
   x = 59,260,781,801.39/111,678.75
6. Step 6: Final answer
   x = 530,636.15