Finding the Fourth Proportional to 61.51, 84.83 and 42.10

Step by Step Solution

1. Step 1: Write the proportion equation
   61.51 : 84.83 = 42.10 : x
2. Step 2: Convert to fraction form
   61.51/84.83 = 42.10/x
3. Step 3: Cross multiply
   61.51x = 84.83 × 42.10
4. Step 4: Simplify right side
   61.51x = 3,571.34
5. Step 5: Solve for x
   x = 3,571.34/61.51
6. Step 6: Final answer
   x = 58.06