Finding the Fourth Proportional to 8,499.84, 11,730.34 and 5,142.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.84 : 11,730.34 = 5,142.80 : x
2. Step 2: Convert to fraction form
   8,499.84/11,730.34 = 5,142.80/x
3. Step 3: Cross multiply
   8,499.84x = 11,730.34 × 5,142.80
4. Step 4: Simplify right side
   8,499.84x = 60,326,733.39
5. Step 5: Solve for x
   x = 60,326,733.39/8,499.84
6. Step 6: Final answer
   x = 7,097.39