Finding the Fourth Proportional to 11,820.72, 17,730.26 and 3,055.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.72 : 17,730.26 = 3,055.30 : x
2. Step 2: Convert to fraction form
   11,820.72/17,730.26 = 3,055.30/x
3. Step 3: Cross multiply
   11,820.72x = 17,730.26 × 3,055.30
4. Step 4: Simplify right side
   11,820.72x = 54,171,263.38
5. Step 5: Solve for x
   x = 54,171,263.38/11,820.72
6. Step 6: Final answer
   x = 4,582.74