Finding the Fourth Proportional to 957,162, 1,320,877.89 and 521,578.56

Step by Step Solution

1. Step 1: Write the proportion equation
   957,162 : 1,320,877.89 = 521,578.56 : x
2. Step 2: Convert to fraction form
   957,162/1,320,877.89 = 521,578.56/x
3. Step 3: Cross multiply
   957,162x = 1,320,877.89 × 521,578.56
4. Step 4: Simplify right side
   957,162x = 688,941,587,802.04
5. Step 5: Solve for x
   x = 688,941,587,802.04/957,162
6. Step 6: Final answer
   x = 719,775.32