Finding the Fourth Proportional to 10,106.81, 13,943.61 and 10,091.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,106.81 : 13,943.61 = 10,091.25 : x
2. Step 2: Convert to fraction form
   10,106.81/13,943.61 = 10,091.25/x
3. Step 3: Cross multiply
   10,106.81x = 13,943.61 × 10,091.25
4. Step 4: Simplify right side
   10,106.81x = 140,708,454.41
5. Step 5: Solve for x
   x = 140,708,454.41/10,106.81
6. Step 6: Final answer
   x = 13,922.14