Finding the Fourth Proportional to 1,899.58, 2,620.67 and 1,153.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.58 : 2,620.67 = 1,153.27 : x
2. Step 2: Convert to fraction form
   1,899.58/2,620.67 = 1,153.27/x
3. Step 3: Cross multiply
   1,899.58x = 2,620.67 × 1,153.27
4. Step 4: Simplify right side
   1,899.58x = 3,022,340.09
5. Step 5: Solve for x
   x = 3,022,340.09/1,899.58
6. Step 6: Final answer
   x = 1,591.06