Finding the Fourth Proportional to 2,591.68, 3,577.40 and 1,529.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.68 : 3,577.40 = 1,529.40 : x
2. Step 2: Convert to fraction form
   2,591.68/3,577.40 = 1,529.40/x
3. Step 3: Cross multiply
   2,591.68x = 3,577.40 × 1,529.40
4. Step 4: Simplify right side
   2,591.68x = 5,471,275.56
5. Step 5: Solve for x
   x = 5,471,275.56/2,591.68
6. Step 6: Final answer
   x = 2,111.09