Finding the Fourth Proportional to 5,290.89, 7,934.71 and 3,657.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.89 : 7,934.71 = 3,657.93 : x
2. Step 2: Convert to fraction form
   5,290.89/7,934.71 = 3,657.93/x
3. Step 3: Cross multiply
   5,290.89x = 7,934.71 × 3,657.93
4. Step 4: Simplify right side
   5,290.89x = 29,024,613.75
5. Step 5: Solve for x
   x = 29,024,613.75/5,290.89
6. Step 6: Final answer
   x = 5,485.77