Finding the Fourth Proportional to 12,654.81, 18,978.78 and 4,756.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,654.81 : 18,978.78 = 4,756.98 : x
2. Step 2: Convert to fraction form
   12,654.81/18,978.78 = 4,756.98/x
3. Step 3: Cross multiply
   12,654.81x = 18,978.78 × 4,756.98
4. Step 4: Simplify right side
   12,654.81x = 90,281,676.88
5. Step 5: Solve for x
   x = 90,281,676.88/12,654.81
6. Step 6: Final answer
   x = 7,134.18