Finding the Fourth Proportional to 13,100.67, 18,085.89 and 10,520.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.67 : 18,085.89 = 10,520.37 : x
2. Step 2: Convert to fraction form
   13,100.67/18,085.89 = 10,520.37/x
3. Step 3: Cross multiply
   13,100.67x = 18,085.89 × 10,520.37
4. Step 4: Simplify right side
   13,100.67x = 190,270,254.58
5. Step 5: Solve for x
   x = 190,270,254.58/13,100.67
6. Step 6: Final answer
   x = 14,523.70