Finding the Third Proportional to 511,538.63 and 800,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   511,538.63 : 800,111.25 = 800,111.25 : x
2. Step 2: Convert to fraction form
   511,538.63/800,111.25 = 800,111.25/x
3. Step 3: Cross multiply
   511,538.63x = 800,111.25 × 800,111.25
4. Step 4: Simplify right side
   511,538.63x = 640,178,012,376.56
5. Step 5: Solve for x
   x = 640,178,012,376.56/511,538.63
6. Step 6: Final answer
   x = 1,251,475.41