Finding the Fourth Proportional to 78.32, 107.97 and 53.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78.32 : 107.97 = 53.69 : x
2. Step 2: Convert to fraction form
   78.32/107.97 = 53.69/x
3. Step 3: Cross multiply
   78.32x = 107.97 × 53.69
4. Step 4: Simplify right side
   78.32x = 5,796.17
5. Step 5: Solve for x
   x = 5,796.17/78.32
6. Step 6: Final answer
   x = 74.00