Finding the Fourth Proportional to 706,105.20, 1,059,165.16 and 279,744.78

Step by Step Solution

1. Step 1: Write the proportion equation
   706,105.20 : 1,059,165.16 = 279,744.78 : x
2. Step 2: Convert to fraction form
   706,105.20/1,059,165.16 = 279,744.78/x
3. Step 3: Cross multiply
   706,105.20x = 1,059,165.16 × 279,744.78
4. Step 4: Simplify right side
   706,105.20x = 296,295,924,667.87
5. Step 5: Solve for x
   x = 296,295,924,667.87/706,105.20
6. Step 6: Final answer
   x = 419,620.09