Finding the Fourth Proportional to 78.33, 117.32 and 60.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78.33 : 117.32 = 60.15 : x
2. Step 2: Convert to fraction form
   78.33/117.32 = 60.15/x
3. Step 3: Cross multiply
   78.33x = 117.32 × 60.15
4. Step 4: Simplify right side
   78.33x = 7,056.50
5. Step 5: Solve for x
   x = 7,056.50/78.33
6. Step 6: Final answer
   x = 90.09