Finding the Fourth Proportional to 13,776.42, 19,011.57 and 7,488.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,776.42 : 19,011.57 = 7,488.78 : x
2. Step 2: Convert to fraction form
   13,776.42/19,011.57 = 7,488.78/x
3. Step 3: Cross multiply
   13,776.42x = 19,011.57 × 7,488.78
4. Step 4: Simplify right side
   13,776.42x = 142,373,465.18
5. Step 5: Solve for x
   x = 142,373,465.18/13,776.42
6. Step 6: Final answer
   x = 10,334.58