Finding the Fourth Proportional to 1,851.32, 2,554.58 and 1,189.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.32 : 2,554.58 = 1,189.07 : x
2. Step 2: Convert to fraction form
   1,851.32/2,554.58 = 1,189.07/x
3. Step 3: Cross multiply
   1,851.32x = 2,554.58 × 1,189.07
4. Step 4: Simplify right side
   1,851.32x = 3,037,568.50
5. Step 5: Solve for x
   x = 3,037,568.50/1,851.32
6. Step 6: Final answer
   x = 1,640.76