Finding the Fourth Proportional to 379.31, 567.72 and 267.91

Step by Step Solution

1. Step 1: Write the proportion equation
   379.31 : 567.72 = 267.91 : x
2. Step 2: Convert to fraction form
   379.31/567.72 = 267.91/x
3. Step 3: Cross multiply
   379.31x = 567.72 × 267.91
4. Step 4: Simplify right side
   379.31x = 152,098.89
5. Step 5: Solve for x
   x = 152,098.89/379.31
6. Step 6: Final answer
   x = 400.98