Finding the Fourth Proportional to 10,742.79, 16,112.97 and 5,191.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,742.79 : 16,112.97 = 5,191.47 : x
2. Step 2: Convert to fraction form
   10,742.79/16,112.97 = 5,191.47/x
3. Step 3: Cross multiply
   10,742.79x = 16,112.97 × 5,191.47
4. Step 4: Simplify right side
   10,742.79x = 83,650,000.37
5. Step 5: Solve for x
   x = 83,650,000.37/10,742.79
6. Step 6: Final answer
   x = 7,786.62