Finding the Fourth Proportional to 101,280.52, 139,768.58 and 55,959.55

Step by Step Solution

1. Step 1: Write the proportion equation
   101,280.52 : 139,768.58 = 55,959.55 : x
2. Step 2: Convert to fraction form
   101,280.52/139,768.58 = 55,959.55/x
3. Step 3: Cross multiply
   101,280.52x = 139,768.58 × 55,959.55
4. Step 4: Simplify right side
   101,280.52x = 7,821,386,840.94
5. Step 5: Solve for x
   x = 7,821,386,840.94/101,280.52
6. Step 6: Final answer
   x = 77,224.99