Finding the Fourth Proportional to 2,656.01, 3,978.54 and 2,133.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.01 : 3,978.54 = 2,133.15 : x
2. Step 2: Convert to fraction form
   2,656.01/3,978.54 = 2,133.15/x
3. Step 3: Cross multiply
   2,656.01x = 3,978.54 × 2,133.15
4. Step 4: Simplify right side
   2,656.01x = 8,486,822.60
5. Step 5: Solve for x
   x = 8,486,822.60/2,656.01
6. Step 6: Final answer
   x = 3,195.33