Finding the Fourth Proportional to 12,474.69, 18,706.56 and 4,678.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,474.69 : 18,706.56 = 4,678.03 : x
2. Step 2: Convert to fraction form
   12,474.69/18,706.56 = 4,678.03/x
3. Step 3: Cross multiply
   12,474.69x = 18,706.56 × 4,678.03
4. Step 4: Simplify right side
   12,474.69x = 87,509,881.03
5. Step 5: Solve for x
   x = 87,509,881.03/12,474.69
6. Step 6: Final answer
   x = 7,015.00