Finding the Fourth Proportional to 1,328.77, 1,994.42 and 598.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.77 : 1,994.42 = 598.69 : x
2. Step 2: Convert to fraction form
   1,328.77/1,994.42 = 598.69/x
3. Step 3: Cross multiply
   1,328.77x = 1,994.42 × 598.69
4. Step 4: Simplify right side
   1,328.77x = 1,194,039.31
5. Step 5: Solve for x
   x = 1,194,039.31/1,328.77
6. Step 6: Final answer
   x = 898.60