Finding the Fourth Proportional to 104.74, 157.86 and 83.50

Step by Step Solution

1. Step 1: Write the proportion equation
   104.74 : 157.86 = 83.50 : x
2. Step 2: Convert to fraction form
   104.74/157.86 = 83.50/x
3. Step 3: Cross multiply
   104.74x = 157.86 × 83.50
4. Step 4: Simplify right side
   104.74x = 13,180.89
5. Step 5: Solve for x
   x = 13,180.89/104.74
6. Step 6: Final answer
   x = 125.84