Finding the Fourth Proportional to 101,112.63, 139,538.12 and 55,791.15

Step by Step Solution

1. Step 1: Write the proportion equation
   101,112.63 : 139,538.12 = 55,791.15 : x
2. Step 2: Convert to fraction form
   101,112.63/139,538.12 = 55,791.15/x
3. Step 3: Cross multiply
   101,112.63x = 139,538.12 × 55,791.15
4. Step 4: Simplify right side
   101,112.63x = 7,784,991,904.68
5. Step 5: Solve for x
   x = 7,784,991,904.68/101,112.63
6. Step 6: Final answer
   x = 76,993.27