Finding the Fourth Proportional to 13,890.05, 19,168.11 and 7,516.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,890.05 : 19,168.11 = 7,516.50 : x
2. Step 2: Convert to fraction form
   13,890.05/19,168.11 = 7,516.50/x
3. Step 3: Cross multiply
   13,890.05x = 19,168.11 × 7,516.50
4. Step 4: Simplify right side
   13,890.05x = 144,077,055.12
5. Step 5: Solve for x
   x = 144,077,055.12/13,890.05
6. Step 6: Final answer
   x = 10,372.68