Finding the Fourth Proportional to 83.10, 114.72 and 61.32

Step by Step Solution

1. Step 1: Write the proportion equation
   83.10 : 114.72 = 61.32 : x
2. Step 2: Convert to fraction form
   83.10/114.72 = 61.32/x
3. Step 3: Cross multiply
   83.10x = 114.72 × 61.32
4. Step 4: Simplify right side
   83.10x = 7,034.63
5. Step 5: Solve for x
   x = 7,034.63/83.10
6. Step 6: Final answer
   x = 84.65