Finding the Fourth Proportional to 12,235.59, 16,884.83 and 7,130.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,235.59 : 16,884.83 = 7,130.78 : x
2. Step 2: Convert to fraction form
   12,235.59/16,884.83 = 7,130.78/x
3. Step 3: Cross multiply
   12,235.59x = 16,884.83 × 7,130.78
4. Step 4: Simplify right side
   12,235.59x = 120,401,972.41
5. Step 5: Solve for x
   x = 120,401,972.41/12,235.59
6. Step 6: Final answer
   x = 9,840.31