Finding the Fourth Proportional to 315,870.76, 435,900.63 and 172,630.77

Step by Step Solution

1. Step 1: Write the proportion equation
   315,870.76 : 435,900.63 = 172,630.77 : x
2. Step 2: Convert to fraction form
   315,870.76/435,900.63 = 172,630.77/x
3. Step 3: Cross multiply
   315,870.76x = 435,900.63 × 172,630.77
4. Step 4: Simplify right side
   315,870.76x = 75,249,861,400.39
5. Step 5: Solve for x
   x = 75,249,861,400.39/315,870.76
6. Step 6: Final answer
   x = 238,229.91