Finding the Fourth Proportional to 13,889.56, 19,167.60 and 7,516.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,889.56 : 19,167.60 = 7,516.15 : x
2. Step 2: Convert to fraction form
   13,889.56/19,167.60 = 7,516.15/x
3. Step 3: Cross multiply
   13,889.56x = 19,167.60 × 7,516.15
4. Step 4: Simplify right side
   13,889.56x = 144,066,556.74
5. Step 5: Solve for x
   x = 144,066,556.74/13,889.56
6. Step 6: Final answer
   x = 10,372.29