Finding the Fourth Proportional to 90.06, 124.24 and 56.84

Step by Step Solution

1. Step 1: Write the proportion equation
   90.06 : 124.24 = 56.84 : x
2. Step 2: Convert to fraction form
   90.06/124.24 = 56.84/x
3. Step 3: Cross multiply
   90.06x = 124.24 × 56.84
4. Step 4: Simplify right side
   90.06x = 7,061.80
5. Step 5: Solve for x
   x = 7,061.80/90.06
6. Step 6: Final answer
   x = 78.41