Finding the Fourth Proportional to 101.83, 152.55 and 78.89

Step by Step Solution

1. Step 1: Write the proportion equation
   101.83 : 152.55 = 78.89 : x
2. Step 2: Convert to fraction form
   101.83/152.55 = 78.89/x
3. Step 3: Cross multiply
   101.83x = 152.55 × 78.89
4. Step 4: Simplify right side
   101.83x = 12,035.38
5. Step 5: Solve for x
   x = 12,035.38/101.83
6. Step 6: Final answer
   x = 118.19