Finding the Fourth Proportional to 3,904.72, 5,388.28 and 2,136.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,904.72 : 5,388.28 = 2,136.32 : x
2. Step 2: Convert to fraction form
   3,904.72/5,388.28 = 2,136.32/x
3. Step 3: Cross multiply
   3,904.72x = 5,388.28 × 2,136.32
4. Step 4: Simplify right side
   3,904.72x = 11,511,090.33
5. Step 5: Solve for x
   x = 11,511,090.33/3,904.72
6. Step 6: Final answer
   x = 2,947.99