Finding the Fourth Proportional to 13,080.51, 18,038.70 and 10,091.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.51 : 18,038.70 = 10,091.61 : x
2. Step 2: Convert to fraction form
   13,080.51/18,038.70 = 10,091.61/x
3. Step 3: Cross multiply
   13,080.51x = 18,038.70 × 10,091.61
4. Step 4: Simplify right side
   13,080.51x = 182,039,525.31
5. Step 5: Solve for x
   x = 182,039,525.31/13,080.51
6. Step 6: Final answer
   x = 13,916.85