Finding the Fourth Proportional to 89.68, 123.82 and 56.95

Step by Step Solution

1. Step 1: Write the proportion equation
   89.68 : 123.82 = 56.95 : x
2. Step 2: Convert to fraction form
   89.68/123.82 = 56.95/x
3. Step 3: Cross multiply
   89.68x = 123.82 × 56.95
4. Step 4: Simplify right side
   89.68x = 7,051.71
5. Step 5: Solve for x
   x = 7,051.71/89.68
6. Step 6: Final answer
   x = 78.63