Finding the Fourth Proportional to 101,386.86, 139,914.77 and 56,067.89

Step by Step Solution

1. Step 1: Write the proportion equation
   101,386.86 : 139,914.77 = 56,067.89 : x
2. Step 2: Convert to fraction form
   101,386.86/139,914.77 = 56,067.89/x
3. Step 3: Cross multiply
   101,386.86x = 139,914.77 × 56,067.89
4. Step 4: Simplify right side
   101,386.86x = 7,844,726,450.09
5. Step 5: Solve for x
   x = 7,844,726,450.09/101,386.86
6. Step 6: Final answer
   x = 77,374.19