Finding the Fourth Proportional to 13,056.86, 18,018.89 and 7,391.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,056.86 : 18,018.89 = 7,391.51 : x
2. Step 2: Convert to fraction form
   13,056.86/18,018.89 = 7,391.51/x
3. Step 3: Cross multiply
   13,056.86x = 18,018.89 × 7,391.51
4. Step 4: Simplify right side
   13,056.86x = 133,186,770.94
5. Step 5: Solve for x
   x = 133,186,770.94/13,056.86
6. Step 6: Final answer
   x = 10,200.52