Finding the Fourth Proportional to 1,318.42, 1,978.08 and 587.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,318.42 : 1,978.08 = 587.89 : x
2. Step 2: Convert to fraction form
   1,318.42/1,978.08 = 587.89/x
3. Step 3: Cross multiply
   1,318.42x = 1,978.08 × 587.89
4. Step 4: Simplify right side
   1,318.42x = 1,162,893.45
5. Step 5: Solve for x
   x = 1,162,893.45/1,318.42
6. Step 6: Final answer
   x = 882.04