Finding the Fourth Proportional to 915.50, 1,373.71 and 367.69

Step by Step Solution

1. Step 1: Write the proportion equation
   915.50 : 1,373.71 = 367.69 : x
2. Step 2: Convert to fraction form
   915.50/1,373.71 = 367.69/x
3. Step 3: Cross multiply
   915.50x = 1,373.71 × 367.69
4. Step 4: Simplify right side
   915.50x = 505,098.34
5. Step 5: Solve for x
   x = 505,098.34/915.50
6. Step 6: Final answer
   x = 551.72