Finding the Fourth Proportional to 92,742.20, 139,016.16 and 42,855.02

Step by Step Solution

1. Step 1: Write the proportion equation
   92,742.20 : 139,016.16 = 42,855.02 : x
2. Step 2: Convert to fraction form
   92,742.20/139,016.16 = 42,855.02/x
3. Step 3: Cross multiply
   92,742.20x = 139,016.16 × 42,855.02
4. Step 4: Simplify right side
   92,742.20x = 5,957,540,317.12
5. Step 5: Solve for x
   x = 5,957,540,317.12/92,742.20
6. Step 6: Final answer
   x = 64,237.64