Finding the Fourth Proportional to 7,290.89, 10,936.42 and 2,905.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,290.89 : 10,936.42 = 2,905.79 : x
2. Step 2: Convert to fraction form
   7,290.89/10,936.42 = 2,905.79/x
3. Step 3: Cross multiply
   7,290.89x = 10,936.42 × 2,905.79
4. Step 4: Simplify right side
   7,290.89x = 31,778,877.93
5. Step 5: Solve for x
   x = 31,778,877.93/7,290.89
6. Step 6: Final answer
   x = 4,358.71