Finding the Fourth Proportional to 1,603.71, 2,406.90 and 1,591.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.71 : 2,406.90 = 1,591.56 : x
2. Step 2: Convert to fraction form
   1,603.71/2,406.90 = 1,591.56/x
3. Step 3: Cross multiply
   1,603.71x = 2,406.90 × 1,591.56
4. Step 4: Simplify right side
   1,603.71x = 3,830,725.76
5. Step 5: Solve for x
   x = 3,830,725.76/1,603.71
6. Step 6: Final answer
   x = 2,388.66