Finding the Fourth Proportional to 99.27, 137.00 and 55.61

Step by Step Solution

1. Step 1: Write the proportion equation
   99.27 : 137.00 = 55.61 : x
2. Step 2: Convert to fraction form
   99.27/137.00 = 55.61/x
3. Step 3: Cross multiply
   99.27x = 137.00 × 55.61
4. Step 4: Simplify right side
   99.27x = 7,617.61
5. Step 5: Solve for x
   x = 7,617.61/99.27
6. Step 6: Final answer
   x = 76.74