Finding the Fourth Proportional to 12,784.68, 17,642.50 and 7,119.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784.68 : 17,642.50 = 7,119.43 : x
2. Step 2: Convert to fraction form
   12,784.68/17,642.50 = 7,119.43/x
3. Step 3: Cross multiply
   12,784.68x = 17,642.50 × 7,119.43
4. Step 4: Simplify right side
   12,784.68x = 125,604,481.87
5. Step 5: Solve for x
   x = 125,604,481.87/12,784.68
6. Step 6: Final answer
   x = 9,824.61