Finding the Fourth Proportional to 1,058,520.24, 1,588,323.72 and 518,766.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058,520.24 : 1,588,323.72 = 518,766.40 : x
2. Step 2: Convert to fraction form
   1,058,520.24/1,588,323.72 = 518,766.40/x
3. Step 3: Cross multiply
   1,058,520.24x = 1,588,323.72 × 518,766.40
4. Step 4: Simplify right side
   1,058,520.24x = 823,968,978,259.01
5. Step 5: Solve for x
   x = 823,968,978,259.01/1,058,520.24
6. Step 6: Final answer
   x = 778,415.89