Finding the Fourth Proportional to 13,087.46, 18,060.30 and 7,422.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.46 : 18,060.30 = 7,422.72 : x
2. Step 2: Convert to fraction form
   13,087.46/18,060.30 = 7,422.72/x
3. Step 3: Cross multiply
   13,087.46x = 18,060.30 × 7,422.72
4. Step 4: Simplify right side
   13,087.46x = 134,056,550.02
5. Step 5: Solve for x
   x = 134,056,550.02/13,087.46
6. Step 6: Final answer
   x = 10,243.13