Finding the Fourth Proportional to 78.32, 108.16 and 50.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78.32 : 108.16 = 50.69 : x
2. Step 2: Convert to fraction form
   78.32/108.16 = 50.69/x
3. Step 3: Cross multiply
   78.32x = 108.16 × 50.69
4. Step 4: Simplify right side
   78.32x = 5,482.77
5. Step 5: Solve for x
   x = 5,482.77/78.32
6. Step 6: Final answer
   x = 70.00