Finding the Fourth Proportional to 926,817.31, 1,279,142.16 and 518,945.43

Step by Step Solution

1. Step 1: Write the proportion equation
   926,817.31 : 1,279,142.16 = 518,945.43 : x
2. Step 2: Convert to fraction form
   926,817.31/1,279,142.16 = 518,945.43/x
3. Step 3: Cross multiply
   926,817.31x = 1,279,142.16 × 518,945.43
4. Step 4: Simplify right side
   926,817.31x = 663,804,978,235.27
5. Step 5: Solve for x
   x = 663,804,978,235.27/926,817.31
6. Step 6: Final answer
   x = 716,219.88