Finding the Fourth Proportional to 99.83, 137.79 and 60.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99.83 : 137.79 = 60.50 : x
2. Step 2: Convert to fraction form
   99.83/137.79 = 60.50/x
3. Step 3: Cross multiply
   99.83x = 137.79 × 60.50
4. Step 4: Simplify right side
   99.83x = 8,336.30
5. Step 5: Solve for x
   x = 8,336.30/99.83
6. Step 6: Final answer
   x = 83.50