Finding the Fourth Proportional to 1,389.59, 1,917.63 and 1,035.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.59 : 1,917.63 = 1,035.82 : x
2. Step 2: Convert to fraction form
   1,389.59/1,917.63 = 1,035.82/x
3. Step 3: Cross multiply
   1,389.59x = 1,917.63 × 1,035.82
4. Step 4: Simplify right side
   1,389.59x = 1,986,319.51
5. Step 5: Solve for x
   x = 1,986,319.51/1,389.59
6. Step 6: Final answer
   x = 1,429.43