Finding the Fourth Proportional to 69.83, 105.13 and 51.94

Step by Step Solution

1. Step 1: Write the proportion equation
   69.83 : 105.13 = 51.94 : x
2. Step 2: Convert to fraction form
   69.83/105.13 = 51.94/x
3. Step 3: Cross multiply
   69.83x = 105.13 × 51.94
4. Step 4: Simplify right side
   69.83x = 5,460.45
5. Step 5: Solve for x
   x = 5,460.45/69.83
6. Step 6: Final answer
   x = 78.20