Finding the Fourth Proportional to 101,418.89, 139,956.86 and 56,093.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,418.89 : 139,956.86 = 56,093.31 : x
2. Step 2: Convert to fraction form
   101,418.89/139,956.86 = 56,093.31/x
3. Step 3: Cross multiply
   101,418.89x = 139,956.86 × 56,093.31
4. Step 4: Simplify right side
   101,418.89x = 7,850,643,674.84
5. Step 5: Solve for x
   x = 7,850,643,674.84/101,418.89
6. Step 6: Final answer
   x = 77,408.10