Finding the Fourth Proportional to 90.59, 124.71 and 68.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90.59 : 124.71 = 68.72 : x
2. Step 2: Convert to fraction form
   90.59/124.71 = 68.72/x
3. Step 3: Cross multiply
   90.59x = 124.71 × 68.72
4. Step 4: Simplify right side
   90.59x = 8,570.07
5. Step 5: Solve for x
   x = 8,570.07/90.59
6. Step 6: Final answer
   x = 94.60