Finding the Fourth Proportional to 78.86, 118.29 and 59.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78.86 : 118.29 = 59.63 : x
2. Step 2: Convert to fraction form
   78.86/118.29 = 59.63/x
3. Step 3: Cross multiply
   78.86x = 118.29 × 59.63
4. Step 4: Simplify right side
   78.86x = 7,053.04
5. Step 5: Solve for x
   x = 7,053.04/78.86
6. Step 6: Final answer
   x = 89.44