Finding the Fourth Proportional to 11,111.52, 16,664.81 and 3,212.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,111.52 : 16,664.81 = 3,212.31 : x
2. Step 2: Convert to fraction form
   11,111.52/16,664.81 = 3,212.31/x
3. Step 3: Cross multiply
   11,111.52x = 16,664.81 × 3,212.31
4. Step 4: Simplify right side
   11,111.52x = 53,532,531.80
5. Step 5: Solve for x
   x = 53,532,531.80/11,111.52
6. Step 6: Final answer
   x = 4,817.75