Finding the Fourth Proportional to 99.82, 149.56 and 54.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99.82 : 149.56 = 54.06 : x
2. Step 2: Convert to fraction form
   99.82/149.56 = 54.06/x
3. Step 3: Cross multiply
   99.82x = 149.56 × 54.06
4. Step 4: Simplify right side
   99.82x = 8,085.21
5. Step 5: Solve for x
   x = 8,085.21/99.82
6. Step 6: Final answer
   x = 81.00