Finding the Fourth Proportional to 93.43, 140.23 and 78.10

Step by Step Solution

1. Step 1: Write the proportion equation
   93.43 : 140.23 = 78.10 : x
2. Step 2: Convert to fraction form
   93.43/140.23 = 78.10/x
3. Step 3: Cross multiply
   93.43x = 140.23 × 78.10
4. Step 4: Simplify right side
   93.43x = 10,951.83
5. Step 5: Solve for x
   x = 10,951.83/93.43
6. Step 6: Final answer
   x = 117.23