Finding the Fourth Proportional to 9,434.79, 13,019.39 and 5,185.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,434.79 : 13,019.39 = 5,185.76 : x
2. Step 2: Convert to fraction form
   9,434.79/13,019.39 = 5,185.76/x
3. Step 3: Cross multiply
   9,434.79x = 13,019.39 × 5,185.76
4. Step 4: Simplify right side
   9,434.79x = 67,515,340.86
5. Step 5: Solve for x
   x = 67,515,340.86/9,434.79
6. Step 6: Final answer
   x = 7,156.00