Finding the Fourth Proportional to 13,081.33, 17,810.72 and 13,039.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.33 : 17,810.72 = 13,039.81 : x
2. Step 2: Convert to fraction form
   13,081.33/17,810.72 = 13,039.81/x
3. Step 3: Cross multiply
   13,081.33x = 17,810.72 × 13,039.81
4. Step 4: Simplify right side
   13,081.33x = 232,248,404.76
5. Step 5: Solve for x
   x = 232,248,404.76/13,081.33
6. Step 6: Final answer
   x = 17,754.19