Finding the Fourth Proportional to 522,067.60, 729,320 and 522,067.60

Step by Step Solution

1. Step 1: Write the proportion equation
   522,067.60 : 729,320 = 522,067.60 : x
2. Step 2: Convert to fraction form
   522,067.60/729,320 = 522,067.60/x
3. Step 3: Cross multiply
   522,067.60x = 729,320 × 522,067.60
4. Step 4: Simplify right side
   522,067.60x = 380,754,342,032
5. Step 5: Solve for x
   x = 380,754,342,032/522,067.60
6. Step 6: Final answer
   x = 729,320