Finding the Fourth Proportional to 5,155.05, 7,729.21 and 3,394.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,155.05 : 7,729.21 = 3,394.72 : x
2. Step 2: Convert to fraction form
   5,155.05/7,729.21 = 3,394.72/x
3. Step 3: Cross multiply
   5,155.05x = 7,729.21 × 3,394.72
4. Step 4: Simplify right side
   5,155.05x = 26,238,503.77
5. Step 5: Solve for x
   x = 26,238,503.77/5,155.05
6. Step 6: Final answer
   x = 5,089.86