Finding the Fourth Proportional to 13,045.77, 18,003.87 and 7,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,045.77 : 18,003.87 = 7,380.72 : x
2. Step 2: Convert to fraction form
   13,045.77/18,003.87 = 7,380.72/x
3. Step 3: Cross multiply
   13,045.77x = 18,003.87 × 7,380.72
4. Step 4: Simplify right side
   13,045.77x = 132,881,523.39
5. Step 5: Solve for x
   x = 132,881,523.39/13,045.77
6. Step 6: Final answer
   x = 10,185.79