Finding the Fourth Proportional to 101,078.40, 139,494.72 and 58,651.20

Step by Step Solution

1. Step 1: Write the proportion equation
   101,078.40 : 139,494.72 = 58,651.20 : x
2. Step 2: Convert to fraction form
   101,078.40/139,494.72 = 58,651.20/x
3. Step 3: Cross multiply
   101,078.40x = 139,494.72 × 58,651.20
4. Step 4: Simplify right side
   101,078.40x = 8,181,532,721.66
5. Step 5: Solve for x
   x = 8,181,532,721.66/101,078.40
6. Step 6: Final answer
   x = 80,942.44