Finding the Fourth Proportional to 18,476.81, 25,498.00 and 9,978.94

Step by Step Solution

1. Step 1: Write the proportion equation
   18,476.81 : 25,498.00 = 9,978.94 : x
2. Step 2: Convert to fraction form
   18,476.81/25,498.00 = 9,978.94/x
3. Step 3: Cross multiply
   18,476.81x = 25,498.00 × 9,978.94
4. Step 4: Simplify right side
   18,476.81x = 254,442,834.74
5. Step 5: Solve for x
   x = 254,442,834.74/18,476.81
6. Step 6: Final answer
   x = 13,770.93