Finding the Fourth Proportional to 90.48, 124.89 and 61.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90.48 : 124.89 = 61.37 : x
2. Step 2: Convert to fraction form
   90.48/124.89 = 61.37/x
3. Step 3: Cross multiply
   90.48x = 124.89 × 61.37
4. Step 4: Simplify right side
   90.48x = 7,664.50
5. Step 5: Solve for x
   x = 7,664.50/90.48
6. Step 6: Final answer
   x = 84.71