Finding the Fourth Proportional to 1,039.39, 1,434.31 and 596.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.39 : 1,434.31 = 596.98 : x
2. Step 2: Convert to fraction form
   1,039.39/1,434.31 = 596.98/x
3. Step 3: Cross multiply
   1,039.39x = 1,434.31 × 596.98
4. Step 4: Simplify right side
   1,039.39x = 856,254.38
5. Step 5: Solve for x
   x = 856,254.38/1,039.39
6. Step 6: Final answer
   x = 823.80