Finding the Fourth Proportional to 10,119.55, 13,963.96 and 5,642.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,119.55 : 13,963.96 = 5,642.89 : x
2. Step 2: Convert to fraction form
   10,119.55/13,963.96 = 5,642.89/x
3. Step 3: Cross multiply
   10,119.55x = 13,963.96 × 5,642.89
4. Step 4: Simplify right side
   10,119.55x = 78,797,090.24
5. Step 5: Solve for x
   x = 78,797,090.24/10,119.55
6. Step 6: Final answer
   x = 7,786.62