Finding the Fourth Proportional to 6,178.42, 8,518.78 and 4,915.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,178.42 : 8,518.78 = 4,915.62 : x
2. Step 2: Convert to fraction form
   6,178.42/8,518.78 = 4,915.62/x
3. Step 3: Cross multiply
   6,178.42x = 8,518.78 × 4,915.62
4. Step 4: Simplify right side
   6,178.42x = 41,875,085.34
5. Step 5: Solve for x
   x = 41,875,085.34/6,178.42
6. Step 6: Final answer
   x = 6,777.64