Finding the Fourth Proportional to 61.25, 91.37 and 56.18

Step by Step Solution

1. Step 1: Write the proportion equation
   61.25 : 91.37 = 56.18 : x
2. Step 2: Convert to fraction form
   61.25/91.37 = 56.18/x
3. Step 3: Cross multiply
   61.25x = 91.37 × 56.18
4. Step 4: Simplify right side
   61.25x = 5,133.54
5. Step 5: Solve for x
   x = 5,133.54/61.25
6. Step 6: Final answer
   x = 83.82