Finding the Fourth Proportional to 11,820.52, 17,734.12 and 3,923.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.52 : 17,734.12 = 3,923.78 : x
2. Step 2: Convert to fraction form
   11,820.52/17,734.12 = 3,923.78/x
3. Step 3: Cross multiply
   11,820.52x = 17,734.12 × 3,923.78
4. Step 4: Simplify right side
   11,820.52x = 69,584,785.37
5. Step 5: Solve for x
   x = 69,584,785.37/11,820.52
6. Step 6: Final answer
   x = 5,886.78