Finding the Fourth Proportional to 68.86, 103.31 and 56.10

Step by Step Solution

1. Step 1: Write the proportion equation
   68.86 : 103.31 = 56.10 : x
2. Step 2: Convert to fraction form
   68.86/103.31 = 56.10/x
3. Step 3: Cross multiply
   68.86x = 103.31 × 56.10
4. Step 4: Simplify right side
   68.86x = 5,795.69
5. Step 5: Solve for x
   x = 5,795.69/68.86
6. Step 6: Final answer
   x = 84.17