Finding the Fourth Proportional to 1,851.55, 2,554.41 and 1,188.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.55 : 2,554.41 = 1,188.30 : x
2. Step 2: Convert to fraction form
   1,851.55/2,554.41 = 1,188.30/x
3. Step 3: Cross multiply
   1,851.55x = 2,554.41 × 1,188.30
4. Step 4: Simplify right side
   1,851.55x = 3,035,405.40
5. Step 5: Solve for x
   x = 3,035,405.40/1,851.55
6. Step 6: Final answer
   x = 1,639.39