Finding the Fourth Proportional to 61.17, 91.61 and 34.05

Step by Step Solution

1. Step 1: Write the proportion equation
   61.17 : 91.61 = 34.05 : x
2. Step 2: Convert to fraction form
   61.17/91.61 = 34.05/x
3. Step 3: Cross multiply
   61.17x = 91.61 × 34.05
4. Step 4: Simplify right side
   61.17x = 3,119.32
5. Step 5: Solve for x
   x = 3,119.32/61.17
6. Step 6: Final answer
   x = 50.99