Finding the Fourth Proportional to 315,348.30, 435,181.86 and 172,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,348.30 : 435,181.86 = 172,111.50 : x
2. Step 2: Convert to fraction form
   315,348.30/435,181.86 = 172,111.50/x
3. Step 3: Cross multiply
   315,348.30x = 435,181.86 × 172,111.50
4. Step 4: Simplify right side
   315,348.30x = 74,899,802,697.39
5. Step 5: Solve for x
   x = 74,899,802,697.39/315,348.30
6. Step 6: Final answer
   x = 237,514.53