Finding the Fourth Proportional to 315,667.50, 435,618.54 and 172,427.58

Step by Step Solution

1. Step 1: Write the proportion equation
   315,667.50 : 435,618.54 = 172,427.58 : x
2. Step 2: Convert to fraction form
   315,667.50/435,618.54 = 172,427.58/x
3. Step 3: Cross multiply
   315,667.50x = 435,618.54 × 172,427.58
4. Step 4: Simplify right side
   315,667.50x = 75,112,650,655.33
5. Step 5: Solve for x
   x = 75,112,650,655.33/315,667.50
6. Step 6: Final answer
   x = 237,948.63