Finding the Fourth Proportional to 1,381.15, 1,903.80 and 1,086.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.15 : 1,903.80 = 1,086.04 : x
2. Step 2: Convert to fraction form
   1,381.15/1,903.80 = 1,086.04/x
3. Step 3: Cross multiply
   1,381.15x = 1,903.80 × 1,086.04
4. Step 4: Simplify right side
   1,381.15x = 2,067,602.95
5. Step 5: Solve for x
   x = 2,067,602.95/1,381.15
6. Step 6: Final answer
   x = 1,497.02