Finding the Fourth Proportional to 13,011.55, 19,528.39 and 5,119.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.55 : 19,528.39 = 5,119.59 : x
2. Step 2: Convert to fraction form
   13,011.55/19,528.39 = 5,119.59/x
3. Step 3: Cross multiply
   13,011.55x = 19,528.39 × 5,119.59
4. Step 4: Simplify right side
   13,011.55x = 99,977,319.94
5. Step 5: Solve for x
   x = 99,977,319.94/13,011.55
6. Step 6: Final answer
   x = 7,683.73