Finding the Fourth Proportional to 13,525.89, 18,665.83 and 7,557.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,525.89 : 18,665.83 = 7,557.81 : x
2. Step 2: Convert to fraction form
   13,525.89/18,665.83 = 7,557.81/x
3. Step 3: Cross multiply
   13,525.89x = 18,665.83 × 7,557.81
4. Step 4: Simplify right side
   13,525.89x = 141,072,805.51
5. Step 5: Solve for x
   x = 141,072,805.51/13,525.89
6. Step 6: Final answer
   x = 10,429.83