Finding the Third Proportional to 263,178 and 553,857.75

Step by Step Solution

1. Step 1: Write the proportion equation
   263,178 : 553,857.75 = 553,857.75 : x
2. Step 2: Convert to fraction form
   263,178/553,857.75 = 553,857.75/x
3. Step 3: Cross multiply
   263,178x = 553,857.75 × 553,857.75
4. Step 4: Simplify right side
   263,178x = 306,758,407,235.06
5. Step 5: Solve for x
   x = 306,758,407,235.06/263,178
6. Step 6: Final answer
   x = 1,165,592.90