Finding the Fourth Proportional to 1,403.31, 1,935.46 and 1,089.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.31 : 1,935.46 = 1,089.53 : x
2. Step 2: Convert to fraction form
   1,403.31/1,935.46 = 1,089.53/x
3. Step 3: Cross multiply
   1,403.31x = 1,935.46 × 1,089.53
4. Step 4: Simplify right side
   1,403.31x = 2,108,741.73
5. Step 5: Solve for x
   x = 2,108,741.73/1,403.31
6. Step 6: Final answer
   x = 1,502.69