Finding the Fourth Proportional to 171,667.46, 256,800.81 and 138,425.06

Step by Step Solution

1. Step 1: Write the proportion equation
   171,667.46 : 256,800.81 = 138,425.06 : x
2. Step 2: Convert to fraction form
   171,667.46/256,800.81 = 138,425.06/x
3. Step 3: Cross multiply
   171,667.46x = 256,800.81 × 138,425.06
4. Step 4: Simplify right side
   171,667.46x = 35,547,667,532.30
5. Step 5: Solve for x
   x = 35,547,667,532.30/171,667.46
6. Step 6: Final answer
   x = 207,072.83