Finding the Fourth Proportional to 2,113.82, 2,917.84 and 1,591.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.82 : 2,917.84 = 1,591.36 : x
2. Step 2: Convert to fraction form
   2,113.82/2,917.84 = 1,591.36/x
3. Step 3: Cross multiply
   2,113.82x = 2,917.84 × 1,591.36
4. Step 4: Simplify right side
   2,113.82x = 4,643,333.86
5. Step 5: Solve for x
   x = 4,643,333.86/2,113.82
6. Step 6: Final answer
   x = 2,196.66