Finding the Fourth Proportional to 1,591.10, 2,380.83 and 1,129.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.10 : 2,380.83 = 1,129.34 : x
2. Step 2: Convert to fraction form
   1,591.10/2,380.83 = 1,129.34/x
3. Step 3: Cross multiply
   1,591.10x = 2,380.83 × 1,129.34
4. Step 4: Simplify right side
   1,591.10x = 2,688,766.55
5. Step 5: Solve for x
   x = 2,688,766.55/1,591.10
6. Step 6: Final answer
   x = 1,689.88