Finding the Fourth Proportional to 13,052.69, 18,013.54 and 7,385.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,052.69 : 18,013.54 = 7,385.28 : x
2. Step 2: Convert to fraction form
   13,052.69/18,013.54 = 7,385.28/x
3. Step 3: Cross multiply
   13,052.69x = 18,013.54 × 7,385.28
4. Step 4: Simplify right side
   13,052.69x = 133,035,116.51
5. Step 5: Solve for x
   x = 133,035,116.51/13,052.69
6. Step 6: Final answer
   x = 10,192.16