Finding the Fourth Proportional to 1,039.68, 1,434.56 and 591.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.68 : 1,434.56 = 591.48 : x
2. Step 2: Convert to fraction form
   1,039.68/1,434.56 = 591.48/x
3. Step 3: Cross multiply
   1,039.68x = 1,434.56 × 591.48
4. Step 4: Simplify right side
   1,039.68x = 848,510.59
5. Step 5: Solve for x
   x = 848,510.59/1,039.68
6. Step 6: Final answer
   x = 816.13