Finding the Fourth Proportional to 1,179.42, 1,768.93 and 399.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.42 : 1,768.93 = 399.34 : x
2. Step 2: Convert to fraction form
   1,179.42/1,768.93 = 399.34/x
3. Step 3: Cross multiply
   1,179.42x = 1,768.93 × 399.34
4. Step 4: Simplify right side
   1,179.42x = 706,404.51
5. Step 5: Solve for x
   x = 706,404.51/1,179.42
6. Step 6: Final answer
   x = 598.94