Finding the Fourth Proportional to 1,591.83, 2,191.83 and 1,381.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.83 : 2,191.83 = 1,381.64 : x
2. Step 2: Convert to fraction form
   1,591.83/2,191.83 = 1,381.64/x
3. Step 3: Cross multiply
   1,591.83x = 2,191.83 × 1,381.64
4. Step 4: Simplify right side
   1,591.83x = 3,028,309.04
5. Step 5: Solve for x
   x = 3,028,309.04/1,591.83
6. Step 6: Final answer
   x = 1,902.41