Finding the Fourth Proportional to 109.83, 152.32 and 100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   109.83 : 152.32 = 100.72 : x
2. Step 2: Convert to fraction form
   109.83/152.32 = 100.72/x
3. Step 3: Cross multiply
   109.83x = 152.32 × 100.72
4. Step 4: Simplify right side
   109.83x = 15,341.67
5. Step 5: Solve for x
   x = 15,341.67/109.83
6. Step 6: Final answer
   x = 139.69