Finding the Fourth Proportional to 78.93, 118.17 and 53.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78.93 : 118.17 = 53.10 : x
2. Step 2: Convert to fraction form
   78.93/118.17 = 53.10/x
3. Step 3: Cross multiply
   78.93x = 118.17 × 53.10
4. Step 4: Simplify right side
   78.93x = 6,274.83
5. Step 5: Solve for x
   x = 6,274.83/78.93
6. Step 6: Final answer
   x = 79.50