Finding the Fourth Proportional to 113,712.72, 156,924.24 and 65,994.48

Step by Step Solution

1. Step 1: Write the proportion equation
   113,712.72 : 156,924.24 = 65,994.48 : x
2. Step 2: Convert to fraction form
   113,712.72/156,924.24 = 65,994.48/x
3. Step 3: Cross multiply
   113,712.72x = 156,924.24 × 65,994.48
4. Step 4: Simplify right side
   113,712.72x = 10,356,133,618.20
5. Step 5: Solve for x
   x = 10,356,133,618.20/113,712.72
6. Step 6: Final answer
   x = 91,072.78