Finding the Fourth Proportional to 131.40, 181.56 and 104.00

Step by Step Solution

1. Step 1: Write the proportion equation
   131.40 : 181.56 = 104.00 : x
2. Step 2: Convert to fraction form
   131.40/181.56 = 104.00/x
3. Step 3: Cross multiply
   131.40x = 181.56 × 104.00
4. Step 4: Simplify right side
   131.40x = 18,881.33
5. Step 5: Solve for x
   x = 18,881.33/131.40
6. Step 6: Final answer
   x = 143.69