Finding the Fourth Proportional to 109.34, 150.72 and 69.99

Step by Step Solution

1. Step 1: Write the proportion equation
   109.34 : 150.72 = 69.99 : x
2. Step 2: Convert to fraction form
   109.34/150.72 = 69.99/x
3. Step 3: Cross multiply
   109.34x = 150.72 × 69.99
4. Step 4: Simplify right side
   109.34x = 10,549.07
5. Step 5: Solve for x
   x = 10,549.07/109.34
6. Step 6: Final answer
   x = 96.48