Finding the Fourth Proportional to 93,142.50, 128,667.36 and 83,067.72

Step by Step Solution

1. Step 1: Write the proportion equation
   93,142.50 : 128,667.36 = 83,067.72 : x
2. Step 2: Convert to fraction form
   93,142.50/128,667.36 = 83,067.72/x
3. Step 3: Cross multiply
   93,142.50x = 128,667.36 × 83,067.72
4. Step 4: Simplify right side
   93,142.50x = 10,688,104,233.62
5. Step 5: Solve for x
   x = 10,688,104,233.62/93,142.50
6. Step 6: Final answer
   x = 114,750.03