Finding the Fourth Proportional to 11,420.51, 17,131.82 and 3,100.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,420.51 : 17,131.82 = 3,100.55 : x
2. Step 2: Convert to fraction form
   11,420.51/17,131.82 = 3,100.55/x
3. Step 3: Cross multiply
   11,420.51x = 17,131.82 × 3,100.55
4. Step 4: Simplify right side
   11,420.51x = 53,117,963.34
5. Step 5: Solve for x
   x = 53,117,963.34/11,420.51
6. Step 6: Final answer
   x = 4,651.10