Finding the Fourth Proportional to 101,071.16, 139,481.55 and 55,133.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,071.16 : 139,481.55 = 55,133.31 : x
2. Step 2: Convert to fraction form
   101,071.16/139,481.55 = 55,133.31/x
3. Step 3: Cross multiply
   101,071.16x = 139,481.55 × 55,133.31
4. Step 4: Simplify right side
   101,071.16x = 7,690,079,535.43
5. Step 5: Solve for x
   x = 7,690,079,535.43/101,071.16
6. Step 6: Final answer
   x = 76,085.80