Finding the Fourth Proportional to 13,976.81, 19,287.83 and 10,407.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,976.81 : 19,287.83 = 10,407.74 : x
2. Step 2: Convert to fraction form
   13,976.81/19,287.83 = 10,407.74/x
3. Step 3: Cross multiply
   13,976.81x = 19,287.83 × 10,407.74
4. Step 4: Simplify right side
   13,976.81x = 200,742,649.38
5. Step 5: Solve for x
   x = 200,742,649.38/13,976.81
6. Step 6: Final answer
   x = 14,362.55