Finding the Fourth Proportional to 2,117.90, 3,178.37 and 1,568.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.90 : 3,178.37 = 1,568.43 : x
2. Step 2: Convert to fraction form
   2,117.90/3,178.37 = 1,568.43/x
3. Step 3: Cross multiply
   2,117.90x = 3,178.37 × 1,568.43
4. Step 4: Simplify right side
   2,117.90x = 4,985,054.78
5. Step 5: Solve for x
   x = 4,985,054.78/2,117.90
6. Step 6: Final answer
   x = 2,353.77