Finding the Fourth Proportional to 1,376.81, 1,900.08 and 1,081.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.81 : 1,900.08 = 1,081.57 : x
2. Step 2: Convert to fraction form
   1,376.81/1,900.08 = 1,081.57/x
3. Step 3: Cross multiply
   1,376.81x = 1,900.08 × 1,081.57
4. Step 4: Simplify right side
   1,376.81x = 2,055,069.53
5. Step 5: Solve for x
   x = 2,055,069.53/1,376.81
6. Step 6: Final answer
   x = 1,492.63