Finding the Fourth Proportional to 1,039.72, 1,434.76 and 597.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.72 : 1,434.76 = 597.61 : x
2. Step 2: Convert to fraction form
   1,039.72/1,434.76 = 597.61/x
3. Step 3: Cross multiply
   1,039.72x = 1,434.76 × 597.61
4. Step 4: Simplify right side
   1,039.72x = 857,430.58
5. Step 5: Solve for x
   x = 857,430.58/1,039.72
6. Step 6: Final answer
   x = 824.68