Finding the Fourth Proportional to 13,887.20, 19,164.24 and 7,513.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,887.20 : 19,164.24 = 7,513.76 : x
2. Step 2: Convert to fraction form
   13,887.20/19,164.24 = 7,513.76/x
3. Step 3: Cross multiply
   13,887.20x = 19,164.24 × 7,513.76
4. Step 4: Simplify right side
   13,887.20x = 143,995,499.94
5. Step 5: Solve for x
   x = 143,995,499.94/13,887.20
6. Step 6: Final answer
   x = 10,368.94