Finding the Fourth Proportional to 11,478.75, 17,215.86 and 3,156.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,478.75 : 17,215.86 = 3,156.63 : x
2. Step 2: Convert to fraction form
   11,478.75/17,215.86 = 3,156.63/x
3. Step 3: Cross multiply
   11,478.75x = 17,215.86 × 3,156.63
4. Step 4: Simplify right side
   11,478.75x = 54,344,100.15
5. Step 5: Solve for x
   x = 54,344,100.15/11,478.75
6. Step 6: Final answer
   x = 4,734.32