Finding the Fourth Proportional to 10,105.64, 13,942.01 and 10,090.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.64 : 13,942.01 = 10,090.06 : x
2. Step 2: Convert to fraction form
   10,105.64/13,942.01 = 10,090.06/x
3. Step 3: Cross multiply
   10,105.64x = 13,942.01 × 10,090.06
4. Step 4: Simplify right side
   10,105.64x = 140,675,703.32
5. Step 5: Solve for x
   x = 140,675,703.32/10,105.64
6. Step 6: Final answer
   x = 13,920.52