Finding the Fourth Proportional to 12,181.28, 18,273.83 and 5,161.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,181.28 : 18,273.83 = 5,161.31 : x
2. Step 2: Convert to fraction form
   12,181.28/18,273.83 = 5,161.31/x
3. Step 3: Cross multiply
   12,181.28x = 18,273.83 × 5,161.31
4. Step 4: Simplify right side
   12,181.28x = 94,316,875.71
5. Step 5: Solve for x
   x = 94,316,875.71/12,181.28
6. Step 6: Final answer
   x = 7,742.77