Finding the Fourth Proportional to 11,471.84, 17,207.72 and 3,151.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,471.84 : 17,207.72 = 3,151.86 : x
2. Step 2: Convert to fraction form
   11,471.84/17,207.72 = 3,151.86/x
3. Step 3: Cross multiply
   11,471.84x = 17,207.72 × 3,151.86
4. Step 4: Simplify right side
   11,471.84x = 54,236,308.60
5. Step 5: Solve for x
   x = 54,236,308.60/11,471.84
6. Step 6: Final answer
   x = 4,727.78