Finding the Fourth Proportional to 9,111.63, 13,669.74 and 3,187.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.63 : 13,669.74 = 3,187.83 : x
2. Step 2: Convert to fraction form
   9,111.63/13,669.74 = 3,187.83/x
3. Step 3: Cross multiply
   9,111.63x = 13,669.74 × 3,187.83
4. Step 4: Simplify right side
   9,111.63x = 43,576,807.26
5. Step 5: Solve for x
   x = 43,576,807.26/9,111.63
6. Step 6: Final answer
   x = 4,782.55