Finding the Fourth Proportional to 6,123.88, 8,454.18 and 4,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,123.88 : 8,454.18 = 4,915.72 : x
2. Step 2: Convert to fraction form
   6,123.88/8,454.18 = 4,915.72/x
3. Step 3: Cross multiply
   6,123.88x = 8,454.18 × 4,915.72
4. Step 4: Simplify right side
   6,123.88x = 41,558,381.71
5. Step 5: Solve for x
   x = 41,558,381.71/6,123.88
6. Step 6: Final answer
   x = 6,786.28