Finding the Fourth Proportional to 99.50, 137.30 and 55.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99.50 : 137.30 = 55.82 : x
2. Step 2: Convert to fraction form
   99.50/137.30 = 55.82/x
3. Step 3: Cross multiply
   99.50x = 137.30 × 55.82
4. Step 4: Simplify right side
   99.50x = 7,663.12
5. Step 5: Solve for x
   x = 7,663.12/99.50
6. Step 6: Final answer
   x = 77.02