Finding the Fourth Proportional to 101,009.57, 139,394.18 and 55,689.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,009.57 : 139,394.18 = 55,689.31 : x
2. Step 2: Convert to fraction form
   101,009.57/139,394.18 = 55,689.31/x
3. Step 3: Cross multiply
   101,009.57x = 139,394.18 × 55,689.31
4. Step 4: Simplify right side
   101,009.57x = 7,762,765,806.85
5. Step 5: Solve for x
   x = 7,762,765,806.85/101,009.57
6. Step 6: Final answer
   x = 76,851.79