Finding the Fourth Proportional to 2,158.42, 2,978.91 and 1,600.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.42 : 2,978.91 = 1,600.48 : x
2. Step 2: Convert to fraction form
   2,158.42/2,978.91 = 1,600.48/x
3. Step 3: Cross multiply
   2,158.42x = 2,978.91 × 1,600.48
4. Step 4: Simplify right side
   2,158.42x = 4,767,696.22
5. Step 5: Solve for x
   x = 4,767,696.22/2,158.42
6. Step 6: Final answer
   x = 2,208.88