Finding the Fourth Proportional to 99.68, 149.56 and 72.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99.68 : 149.56 = 72.83 : x
2. Step 2: Convert to fraction form
   99.68/149.56 = 72.83/x
3. Step 3: Cross multiply
   99.68x = 149.56 × 72.83
4. Step 4: Simplify right side
   99.68x = 10,892.65
5. Step 5: Solve for x
   x = 10,892.65/99.68
6. Step 6: Final answer
   x = 109.28