Finding the Fourth Proportional to 1,898.68, 2,621.40 and 1,191.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.68 : 2,621.40 = 1,191.49 : x
2. Step 2: Convert to fraction form
   1,898.68/2,621.40 = 1,191.49/x
3. Step 3: Cross multiply
   1,898.68x = 2,621.40 × 1,191.49
4. Step 4: Simplify right side
   1,898.68x = 3,123,371.89
5. Step 5: Solve for x
   x = 3,123,371.89/1,898.68
6. Step 6: Final answer
   x = 1,645.02