Finding the Fourth Proportional to 11,875.21, 17,815.82 and 3,555.19

Step by Step Solution

1. Step 1: Write the proportion equation
   11,875.21 : 17,815.82 = 3,555.19 : x
2. Step 2: Convert to fraction form
   11,875.21/17,815.82 = 3,555.19/x
3. Step 3: Cross multiply
   11,875.21x = 17,815.82 × 3,555.19
4. Step 4: Simplify right side
   11,875.21x = 63,338,629.60
5. Step 5: Solve for x
   x = 63,338,629.60/11,875.21
6. Step 6: Final answer
   x = 5,333.69