Finding the Fourth Proportional to 1,591.31, 2,381.32 and 1,173.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.31 : 2,381.32 = 1,173.85 : x
2. Step 2: Convert to fraction form
   1,591.31/2,381.32 = 1,173.85/x
3. Step 3: Cross multiply
   1,591.31x = 2,381.32 × 1,173.85
4. Step 4: Simplify right side
   1,591.31x = 2,795,328.04
5. Step 5: Solve for x
   x = 2,795,328.04/1,591.31
6. Step 6: Final answer
   x = 1,756.62