Finding the Fourth Proportional to 99.96, 150.50 and 69.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99.96 : 150.50 = 69.72 : x
2. Step 2: Convert to fraction form
   99.96/150.50 = 69.72/x
3. Step 3: Cross multiply
   99.96x = 150.50 × 69.72
4. Step 4: Simplify right side
   99.96x = 10,492.51
5. Step 5: Solve for x
   x = 10,492.51/99.96
6. Step 6: Final answer
   x = 104.97