Finding the Fourth Proportional to 555,196.79, 767,462.78 and 495,360.47

Step by Step Solution

1. Step 1: Write the proportion equation
   555,196.79 : 767,462.78 = 495,360.47 : x
2. Step 2: Convert to fraction form
   555,196.79/767,462.78 = 495,360.47/x
3. Step 3: Cross multiply
   555,196.79x = 767,462.78 × 495,360.47
4. Step 4: Simplify right side
   555,196.79x = 380,170,723,408.31
5. Step 5: Solve for x
   x = 380,170,723,408.31/555,196.79
6. Step 6: Final answer
   x = 684,749.50