Finding the Fourth Proportional to 3,388.15, 5,072.64 and 2,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.15 : 5,072.64 = 2,152.50 : x
2. Step 2: Convert to fraction form
   3,388.15/5,072.64 = 2,152.50/x
3. Step 3: Cross multiply
   3,388.15x = 5,072.64 × 2,152.50
4. Step 4: Simplify right side
   3,388.15x = 10,918,857.60
5. Step 5: Solve for x
   x = 10,918,857.60/3,388.15
6. Step 6: Final answer
   x = 3,222.66