Finding the Fourth Proportional to 101,442.18, 139,994.34 and 56,119.38

Step by Step Solution

1. Step 1: Write the proportion equation
   101,442.18 : 139,994.34 = 56,119.38 : x
2. Step 2: Convert to fraction form
   101,442.18/139,994.34 = 56,119.38/x
3. Step 3: Cross multiply
   101,442.18x = 139,994.34 × 56,119.38
4. Step 4: Simplify right side
   101,442.18x = 7,856,395,564.31
5. Step 5: Solve for x
   x = 7,856,395,564.31/101,442.18
6. Step 6: Final answer
   x = 77,447.03