Finding the Fourth Proportional to 315,271.98, 435,085.82 and 172,039.88

Step by Step Solution

1. Step 1: Write the proportion equation
   315,271.98 : 435,085.82 = 172,039.88 : x
2. Step 2: Convert to fraction form
   315,271.98/435,085.82 = 172,039.88/x
3. Step 3: Cross multiply
   315,271.98x = 435,085.82 × 172,039.88
4. Step 4: Simplify right side
   315,271.98x = 74,852,112,262.50
5. Step 5: Solve for x
   x = 74,852,112,262.50/315,271.98
6. Step 6: Final answer
   x = 237,420.76