Finding the Fourth Proportional to 12,784.42, 17,642.45 and 7,119.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784.42 : 17,642.45 = 7,119.23 : x
2. Step 2: Convert to fraction form
   12,784.42/17,642.45 = 7,119.23/x
3. Step 3: Cross multiply
   12,784.42x = 17,642.45 × 7,119.23
4. Step 4: Simplify right side
   12,784.42x = 125,600,659.31
5. Step 5: Solve for x
   x = 125,600,659.31/12,784.42
6. Step 6: Final answer
   x = 9,824.51