Finding the Fourth Proportional to 78.86, 118.31 and 50.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78.86 : 118.31 = 50.01 : x
2. Step 2: Convert to fraction form
   78.86/118.31 = 50.01/x
3. Step 3: Cross multiply
   78.86x = 118.31 × 50.01
4. Step 4: Simplify right side
   78.86x = 5,916.43
5. Step 5: Solve for x
   x = 5,916.43/78.86
6. Step 6: Final answer
   x = 75.03