Finding the Fourth Proportional to 93.03, 139.14 and 78.72

Step by Step Solution

1. Step 1: Write the proportion equation
   93.03 : 139.14 = 78.72 : x
2. Step 2: Convert to fraction form
   93.03/139.14 = 78.72/x
3. Step 3: Cross multiply
   93.03x = 139.14 × 78.72
4. Step 4: Simplify right side
   93.03x = 10,953.10
5. Step 5: Solve for x
   x = 10,953.10/93.03
6. Step 6: Final answer
   x = 117.74