Finding the Fourth Proportional to 13,776.24, 19,011.36 and 7,488.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,776.24 : 19,011.36 = 7,488.72 : x
2. Step 2: Convert to fraction form
   13,776.24/19,011.36 = 7,488.72/x
3. Step 3: Cross multiply
   13,776.24x = 19,011.36 × 7,488.72
4. Step 4: Simplify right side
   13,776.24x = 142,370,751.86
5. Step 5: Solve for x
   x = 142,370,751.86/13,776.24
6. Step 6: Final answer
   x = 10,334.51