Finding the Fourth Proportional to 116,109.60, 160,249.08 and 65,142.96

Step by Step Solution

1. Step 1: Write the proportion equation
   116,109.60 : 160,249.08 = 65,142.96 : x
2. Step 2: Convert to fraction form
   116,109.60/160,249.08 = 65,142.96/x
3. Step 3: Cross multiply
   116,109.60x = 160,249.08 × 65,142.96
4. Step 4: Simplify right side
   116,109.60x = 10,439,099,408.48
5. Step 5: Solve for x
   x = 10,439,099,408.48/116,109.60
6. Step 6: Final answer
   x = 89,907.29