Finding the Fourth Proportional to 15,837.31, 21,858.83 and 13,182.13

Step by Step Solution

1. Step 1: Write the proportion equation
   15,837.31 : 21,858.83 = 13,182.13 : x
2. Step 2: Convert to fraction form
   15,837.31/21,858.83 = 13,182.13/x
3. Step 3: Cross multiply
   15,837.31x = 21,858.83 × 13,182.13
4. Step 4: Simplify right side
   15,837.31x = 288,145,938.71
5. Step 5: Solve for x
   x = 288,145,938.71/15,837.31
6. Step 6: Final answer
   x = 18,194.12