Finding the Fourth Proportional to 100.32, 137.34 and 99.48

Step by Step Solution

1. Step 1: Write the proportion equation
   100.32 : 137.34 = 99.48 : x
2. Step 2: Convert to fraction form
   100.32/137.34 = 99.48/x
3. Step 3: Cross multiply
   100.32x = 137.34 × 99.48
4. Step 4: Simplify right side
   100.32x = 13,662.58
5. Step 5: Solve for x
   x = 13,662.58/100.32
6. Step 6: Final answer
   x = 136.19