Finding the Fourth Proportional to 100,983.98, 139,357.20 and 55,662

Step by Step Solution

1. Step 1: Write the proportion equation
   100,983.98 : 139,357.20 = 55,662 : x
2. Step 2: Convert to fraction form
   100,983.98/139,357.20 = 55,662/x
3. Step 3: Cross multiply
   100,983.98x = 139,357.20 × 55,662
4. Step 4: Simplify right side
   100,983.98x = 7,756,900,466.40
5. Step 5: Solve for x
   x = 7,756,900,466.40/100,983.98
6. Step 6: Final answer
   x = 76,813.18