Finding the Fourth Proportional to 8,499.55, 11,729.64 and 5,142.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.55 : 11,729.64 = 5,142.98 : x
2. Step 2: Convert to fraction form
   8,499.55/11,729.64 = 5,142.98/x
3. Step 3: Cross multiply
   8,499.55x = 11,729.64 × 5,142.98
4. Step 4: Simplify right side
   8,499.55x = 60,325,303.93
5. Step 5: Solve for x
   x = 60,325,303.93/8,499.55
6. Step 6: Final answer
   x = 7,097.47