Finding the Fourth Proportional to 315,662.50, 435,611.67 and 172,422.58

Step by Step Solution

1. Step 1: Write the proportion equation
   315,662.50 : 435,611.67 = 172,422.58 : x
2. Step 2: Convert to fraction form
   315,662.50/435,611.67 = 172,422.58/x
3. Step 3: Cross multiply
   315,662.50x = 435,611.67 × 172,422.58
4. Step 4: Simplify right side
   315,662.50x = 75,109,288,019.51
5. Step 5: Solve for x
   x = 75,109,288,019.51/315,662.50
6. Step 6: Final answer
   x = 237,941.75