Finding the Fourth Proportional to 1,898.94, 2,620.71 and 1,190.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.94 : 2,620.71 = 1,190.89 : x
2. Step 2: Convert to fraction form
   1,898.94/2,620.71 = 1,190.89/x
3. Step 3: Cross multiply
   1,898.94x = 2,620.71 × 1,190.89
4. Step 4: Simplify right side
   1,898.94x = 3,120,977.33
5. Step 5: Solve for x
   x = 3,120,977.33/1,898.94
6. Step 6: Final answer
   x = 1,643.54