Finding the Fourth Proportional to 101,019.80, 139,404.28 and 55,077.68

Step by Step Solution

1. Step 1: Write the proportion equation
   101,019.80 : 139,404.28 = 55,077.68 : x
2. Step 2: Convert to fraction form
   101,019.80/139,404.28 = 55,077.68/x
3. Step 3: Cross multiply
   101,019.80x = 139,404.28 × 55,077.68
4. Step 4: Simplify right side
   101,019.80x = 7,678,064,324.47
5. Step 5: Solve for x
   x = 7,678,064,324.47/101,019.80
6. Step 6: Final answer
   x = 76,005.54