Finding the Fourth Proportional to 491,002.68, 677,676.72 and 307,326.42

Step by Step Solution

1. Step 1: Write the proportion equation
   491,002.68 : 677,676.72 = 307,326.42 : x
2. Step 2: Convert to fraction form
   491,002.68/677,676.72 = 307,326.42/x
3. Step 3: Cross multiply
   491,002.68x = 677,676.72 × 307,326.42
4. Step 4: Simplify right side
   491,002.68x = 208,267,960,274.94
5. Step 5: Solve for x
   x = 208,267,960,274.94/491,002.68
6. Step 6: Final answer
   x = 424,168.68