Finding the Fourth Proportional to 72.35, 99.83 and 42.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72.35 : 99.83 = 42.84 : x
2. Step 2: Convert to fraction form
   72.35/99.83 = 42.84/x
3. Step 3: Cross multiply
   72.35x = 99.83 × 42.84
4. Step 4: Simplify right side
   72.35x = 4,276.82
5. Step 5: Solve for x
   x = 4,276.82/72.35
6. Step 6: Final answer
   x = 59.11