Finding the Fourth Proportional to 957,288.86, 1,321,058.83 and 521,706.31

Step by Step Solution

1. Step 1: Write the proportion equation
   957,288.86 : 1,321,058.83 = 521,706.31 : x
2. Step 2: Convert to fraction form
   957,288.86/1,321,058.83 = 521,706.31/x
3. Step 3: Cross multiply
   957,288.86x = 1,321,058.83 × 521,706.31
4. Step 4: Simplify right side
   957,288.86x = 689,204,722,885.31
5. Step 5: Solve for x
   x = 689,204,722,885.31/957,288.86
6. Step 6: Final answer
   x = 719,954.82