Finding the Fourth Proportional to 131.84, 181.89 and 76.56

Step by Step Solution

1. Step 1: Write the proportion equation
   131.84 : 181.89 = 76.56 : x
2. Step 2: Convert to fraction form
   131.84/181.89 = 76.56/x
3. Step 3: Cross multiply
   131.84x = 181.89 × 76.56
4. Step 4: Simplify right side
   131.84x = 13,925.10
5. Step 5: Solve for x
   x = 13,925.10/131.84
6. Step 6: Final answer
   x = 105.62