Finding the Fourth Proportional to 5,309.50, 7,908.16 and 5,031.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,309.50 : 7,908.16 = 5,031.94 : x
2. Step 2: Convert to fraction form
   5,309.50/7,908.16 = 5,031.94/x
3. Step 3: Cross multiply
   5,309.50x = 7,908.16 × 5,031.94
4. Step 4: Simplify right side
   5,309.50x = 39,793,386.63
5. Step 5: Solve for x
   x = 39,793,386.63/5,309.50
6. Step 6: Final answer
   x = 7,494.75