Finding the Fourth Proportional to 61.76, 85.82 and 61.00

Step by Step Solution

1. Step 1: Write the proportion equation
   61.76 : 85.82 = 61.00 : x
2. Step 2: Convert to fraction form
   61.76/85.82 = 61.00/x
3. Step 3: Cross multiply
   61.76x = 85.82 × 61.00
4. Step 4: Simplify right side
   61.76x = 5,234.59
5. Step 5: Solve for x
   x = 5,234.59/61.76
6. Step 6: Final answer
   x = 84.76