Finding the Fourth Proportional to 83.53, 125.31 and 42.93

Step by Step Solution

1. Step 1: Write the proportion equation
   83.53 : 125.31 = 42.93 : x
2. Step 2: Convert to fraction form
   83.53/125.31 = 42.93/x
3. Step 3: Cross multiply
   83.53x = 125.31 × 42.93
4. Step 4: Simplify right side
   83.53x = 5,379.72
5. Step 5: Solve for x
   x = 5,379.72/83.53
6. Step 6: Final answer
   x = 64.40