Finding the Fourth Proportional to 12,858.39, 17,742.18 and 7,551.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,858.39 : 17,742.18 = 7,551.27 : x
2. Step 2: Convert to fraction form
   12,858.39/17,742.18 = 7,551.27/x
3. Step 3: Cross multiply
   12,858.39x = 17,742.18 × 7,551.27
4. Step 4: Simplify right side
   12,858.39x = 133,975,991.57
5. Step 5: Solve for x
   x = 133,975,991.57/12,858.39
6. Step 6: Final answer
   x = 10,419.34