Finding the Fourth Proportional to 1,915.27, 2,871.18 and 1,330.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.27 : 2,871.18 = 1,330.55 : x
2. Step 2: Convert to fraction form
   1,915.27/2,871.18 = 1,330.55/x
3. Step 3: Cross multiply
   1,915.27x = 2,871.18 × 1,330.55
4. Step 4: Simplify right side
   1,915.27x = 3,820,248.55
5. Step 5: Solve for x
   x = 3,820,248.55/1,915.27
6. Step 6: Final answer
   x = 1,994.63