Finding the Fourth Proportional to 99.93, 149.91 and 72.93

Step by Step Solution

1. Step 1: Write the proportion equation
   99.93 : 149.91 = 72.93 : x
2. Step 2: Convert to fraction form
   99.93/149.91 = 72.93/x
3. Step 3: Cross multiply
   99.93x = 149.91 × 72.93
4. Step 4: Simplify right side
   99.93x = 10,932.94
5. Step 5: Solve for x
   x = 10,932.94/99.93
6. Step 6: Final answer
   x = 109.41