Finding the Fourth Proportional to 61.32, 91.59 and 56.28

Step by Step Solution

1. Step 1: Write the proportion equation
   61.32 : 91.59 = 56.28 : x
2. Step 2: Convert to fraction form
   61.32/91.59 = 56.28/x
3. Step 3: Cross multiply
   61.32x = 91.59 × 56.28
4. Step 4: Simplify right side
   61.32x = 5,154.69
5. Step 5: Solve for x
   x = 5,154.69/61.32
6. Step 6: Final answer
   x = 84.06