Finding the Fourth Proportional to 100,727.89, 139,004.79 and 55,410.52

Step by Step Solution

1. Step 1: Write the proportion equation
   100,727.89 : 139,004.79 = 55,410.52 : x
2. Step 2: Convert to fraction form
   100,727.89/139,004.79 = 55,410.52/x
3. Step 3: Cross multiply
   100,727.89x = 139,004.79 × 55,410.52
4. Step 4: Simplify right side
   100,727.89x = 7,702,327,696.39
5. Step 5: Solve for x
   x = 7,702,327,696.39/100,727.89
6. Step 6: Final answer
   x = 76,466.68