Finding the Fourth Proportional to 93.42, 139.32 and 78.03

Step by Step Solution

1. Step 1: Write the proportion equation
   93.42 : 139.32 = 78.03 : x
2. Step 2: Convert to fraction form
   93.42/139.32 = 78.03/x
3. Step 3: Cross multiply
   93.42x = 139.32 × 78.03
4. Step 4: Simplify right side
   93.42x = 10,871.14
5. Step 5: Solve for x
   x = 10,871.14/93.42
6. Step 6: Final answer
   x = 116.37