Finding the Fourth Proportional to 99.94, 137.99 and 73.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99.94 : 137.99 = 73.72 : x
2. Step 2: Convert to fraction form
   99.94/137.99 = 73.72/x
3. Step 3: Cross multiply
   99.94x = 137.99 × 73.72
4. Step 4: Simplify right side
   99.94x = 10,171.56
5. Step 5: Solve for x
   x = 10,171.56/99.94
6. Step 6: Final answer
   x = 101.78