Finding the Fourth Proportional to 1,378.29, 1,903.59 and 1,101.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.29 : 1,903.59 = 1,101.54 : x
2. Step 2: Convert to fraction form
   1,378.29/1,903.59 = 1,101.54/x
3. Step 3: Cross multiply
   1,378.29x = 1,903.59 × 1,101.54
4. Step 4: Simplify right side
   1,378.29x = 2,096,880.53
5. Step 5: Solve for x
   x = 2,096,880.53/1,378.29
6. Step 6: Final answer
   x = 1,521.36