Finding the Fourth Proportional to 100,983.39, 139,350.74 and 55,658.88

Step by Step Solution

1. Step 1: Write the proportion equation
   100,983.39 : 139,350.74 = 55,658.88 : x
2. Step 2: Convert to fraction form
   100,983.39/139,350.74 = 55,658.88/x
3. Step 3: Cross multiply
   100,983.39x = 139,350.74 × 55,658.88
4. Step 4: Simplify right side
   100,983.39x = 7,756,105,140.52
5. Step 5: Solve for x
   x = 7,756,105,140.52/100,983.39
6. Step 6: Final answer
   x = 76,805.76