Finding the Fourth Proportional to 21,801.15, 30,090.42 and 13,841.87

Step by Step Solution

1. Step 1: Write the proportion equation
   21,801.15 : 30,090.42 = 13,841.87 : x
2. Step 2: Convert to fraction form
   21,801.15/30,090.42 = 13,841.87/x
3. Step 3: Cross multiply
   21,801.15x = 30,090.42 × 13,841.87
4. Step 4: Simplify right side
   21,801.15x = 416,507,531.43
5. Step 5: Solve for x
   x = 416,507,531.43/21,801.15
6. Step 6: Final answer
   x = 19,104.84