Finding the Fourth Proportional to 101,016.78, 139,400.14 and 55,074.66

Step by Step Solution

1. Step 1: Write the proportion equation
   101,016.78 : 139,400.14 = 55,074.66 : x
2. Step 2: Convert to fraction form
   101,016.78/139,400.14 = 55,074.66/x
3. Step 3: Cross multiply
   101,016.78x = 139,400.14 × 55,074.66
4. Step 4: Simplify right side
   101,016.78x = 7,677,415,314.45
5. Step 5: Solve for x
   x = 7,677,415,314.45/101,016.78
6. Step 6: Final answer
   x = 76,001.39