Finding the Fourth Proportional to 14,846.54, 20,527.61 and 12,978.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,846.54 : 20,527.61 = 12,978.18 : x
2. Step 2: Convert to fraction form
   14,846.54/20,527.61 = 12,978.18/x
3. Step 3: Cross multiply
   14,846.54x = 20,527.61 × 12,978.18
4. Step 4: Simplify right side
   14,846.54x = 266,411,017.55
5. Step 5: Solve for x
   x = 266,411,017.55/14,846.54
6. Step 6: Final answer
   x = 17,944.32