Finding the Fourth Proportional to 10,518.23, 15,729.37 and 7,851.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,518.23 : 15,729.37 = 7,851.71 : x
2. Step 2: Convert to fraction form
   10,518.23/15,729.37 = 7,851.71/x
3. Step 3: Cross multiply
   10,518.23x = 15,729.37 × 7,851.71
4. Step 4: Simplify right side
   10,518.23x = 123,502,412.46
5. Step 5: Solve for x
   x = 123,502,412.46/10,518.23
6. Step 6: Final answer
   x = 11,741.75