Finding the Fourth Proportional to 744,783.42, 1,116,287.37 and 518,920.86

Step by Step Solution

1. Step 1: Write the proportion equation
   744,783.42 : 1,116,287.37 = 518,920.86 : x
2. Step 2: Convert to fraction form
   744,783.42/1,116,287.37 = 518,920.86/x
3. Step 3: Cross multiply
   744,783.42x = 1,116,287.37 × 518,920.86
4. Step 4: Simplify right side
   744,783.42x = 579,264,802,047.54
5. Step 5: Solve for x
   x = 579,264,802,047.54/744,783.42
6. Step 6: Final answer
   x = 777,762.75