Finding the Fourth Proportional to 13,112.29, 18,094.86 and 7,143.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,112.29 : 18,094.86 = 7,143.94 : x
2. Step 2: Convert to fraction form
   13,112.29/18,094.86 = 7,143.94/x
3. Step 3: Cross multiply
   13,112.29x = 18,094.86 × 7,143.94
4. Step 4: Simplify right side
   13,112.29x = 129,268,594.15
5. Step 5: Solve for x
   x = 129,268,594.15/13,112.29
6. Step 6: Final answer
   x = 9,858.58