Finding the Fourth Proportional to 2,158.22, 2,978.70 and 1,693.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.22 : 2,978.70 = 1,693.28 : x
2. Step 2: Convert to fraction form
   2,158.22/2,978.70 = 1,693.28/x
3. Step 3: Cross multiply
   2,158.22x = 2,978.70 × 1,693.28
4. Step 4: Simplify right side
   2,158.22x = 5,043,773.14
5. Step 5: Solve for x
   x = 5,043,773.14/2,158.22
6. Step 6: Final answer
   x = 2,337.01