Finding the Fourth Proportional to 99.47, 137.27 and 55.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99.47 : 137.27 = 55.82 : x
2. Step 2: Convert to fraction form
   99.47/137.27 = 55.82/x
3. Step 3: Cross multiply
   99.47x = 137.27 × 55.82
4. Step 4: Simplify right side
   99.47x = 7,661.45
5. Step 5: Solve for x
   x = 7,661.45/99.47
6. Step 6: Final answer
   x = 77.02