Finding the Fourth Proportional to 19,878.84, 27,434.18 and 13,152.82

Step by Step Solution

1. Step 1: Write the proportion equation
   19,878.84 : 27,434.18 = 13,152.82 : x
2. Step 2: Convert to fraction form
   19,878.84/27,434.18 = 13,152.82/x
3. Step 3: Cross multiply
   19,878.84x = 27,434.18 × 13,152.82
4. Step 4: Simplify right side
   19,878.84x = 360,836,831.39
5. Step 5: Solve for x
   x = 360,836,831.39/19,878.84
6. Step 6: Final answer
   x = 18,151.81