Finding the Fourth Proportional to 143,160.42, 214,667.20 and 75,728.86

Step by Step Solution

1. Step 1: Write the proportion equation
   143,160.42 : 214,667.20 = 75,728.86 : x
2. Step 2: Convert to fraction form
   143,160.42/214,667.20 = 75,728.86/x
3. Step 3: Cross multiply
   143,160.42x = 214,667.20 × 75,728.86
4. Step 4: Simplify right side
   143,160.42x = 16,256,502,335.39
5. Step 5: Solve for x
   x = 16,256,502,335.39/143,160.42
6. Step 6: Final answer
   x = 113,554.45