Finding the Fourth Proportional to 101,039.70, 139,431.59 and 55,719.59

Step by Step Solution

1. Step 1: Write the proportion equation
   101,039.70 : 139,431.59 = 55,719.59 : x
2. Step 2: Convert to fraction form
   101,039.70/139,431.59 = 55,719.59/x
3. Step 3: Cross multiply
   101,039.70x = 139,431.59 × 55,719.59
4. Step 4: Simplify right side
   101,039.70x = 7,769,071,097.83
5. Step 5: Solve for x
   x = 7,769,071,097.83/101,039.70
6. Step 6: Final answer
   x = 76,891.27