Finding the Fourth Proportional to 10,155, 15,218.55 and 5,714.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,155 : 15,218.55 = 5,714.81 : x
2. Step 2: Convert to fraction form
   10,155/15,218.55 = 5,714.81/x
3. Step 3: Cross multiply
   10,155x = 15,218.55 × 5,714.81
4. Step 4: Simplify right side
   10,155x = 86,971,045.63
5. Step 5: Solve for x
   x = 86,971,045.63/10,155
6. Step 6: Final answer
   x = 8,564.36