Finding the Fourth Proportional to 12,858.14, 17,742.71 and 7,193.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,858.14 : 17,742.71 = 7,193.21 : x
2. Step 2: Convert to fraction form
   12,858.14/17,742.71 = 7,193.21/x
3. Step 3: Cross multiply
   12,858.14x = 17,742.71 × 7,193.21
4. Step 4: Simplify right side
   12,858.14x = 127,626,968.27
5. Step 5: Solve for x
   x = 127,626,968.27/12,858.14
6. Step 6: Final answer
   x = 9,925.77