Finding the Fourth Proportional to 4,256.78, 6,381.72 and 1,915.58

Step by Step Solution

1. Step 1: Write the proportion equation
   4,256.78 : 6,381.72 = 1,915.58 : x
2. Step 2: Convert to fraction form
   4,256.78/6,381.72 = 1,915.58/x
3. Step 3: Cross multiply
   4,256.78x = 6,381.72 × 1,915.58
4. Step 4: Simplify right side
   4,256.78x = 12,224,711.15
5. Step 5: Solve for x
   x = 12,224,711.15/4,256.78
6. Step 6: Final answer
   x = 2,871.82