Finding the Fourth Proportional to 82.94, 123.91 and 61.18

Step by Step Solution

1. Step 1: Write the proportion equation
   82.94 : 123.91 = 61.18 : x
2. Step 2: Convert to fraction form
   82.94/123.91 = 61.18/x
3. Step 3: Cross multiply
   82.94x = 123.91 × 61.18
4. Step 4: Simplify right side
   82.94x = 7,580.81
5. Step 5: Solve for x
   x = 7,580.81/82.94
6. Step 6: Final answer
   x = 91.40