Finding the Fourth Proportional to 1,899.35, 2,621.34 and 1,153.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.35 : 2,621.34 = 1,153.26 : x
2. Step 2: Convert to fraction form
   1,899.35/2,621.34 = 1,153.26/x
3. Step 3: Cross multiply
   1,899.35x = 2,621.34 × 1,153.26
4. Step 4: Simplify right side
   1,899.35x = 3,023,086.57
5. Step 5: Solve for x
   x = 3,023,086.57/1,899.35
6. Step 6: Final answer
   x = 1,591.64