Finding the Fourth Proportional to 12,784.72, 17,642.76 and 7,119.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784.72 : 17,642.76 = 7,119.48 : x
2. Step 2: Convert to fraction form
   12,784.72/17,642.76 = 7,119.48/x
3. Step 3: Cross multiply
   12,784.72x = 17,642.76 × 7,119.48
4. Step 4: Simplify right side
   12,784.72x = 125,607,276.96
5. Step 5: Solve for x
   x = 125,607,276.96/12,784.72
6. Step 6: Final answer
   x = 9,824.80