Finding the Fourth Proportional to 712,111.62, 1,067,429.28 and 445,259.34

Step by Step Solution

1. Step 1: Write the proportion equation
   712,111.62 : 1,067,429.28 = 445,259.34 : x
2. Step 2: Convert to fraction form
   712,111.62/1,067,429.28 = 445,259.34/x
3. Step 3: Cross multiply
   712,111.62x = 1,067,429.28 × 445,259.34
4. Step 4: Simplify right side
   712,111.62x = 475,282,856,709.48
5. Step 5: Solve for x
   x = 475,282,856,709.48/712,111.62
6. Step 6: Final answer
   x = 667,427.47