Finding the Fourth Proportional to 301,906.72, 416,622.52 and 172,840.88

Step by Step Solution

1. Step 1: Write the proportion equation
   301,906.72 : 416,622.52 = 172,840.88 : x
2. Step 2: Convert to fraction form
   301,906.72/416,622.52 = 172,840.88/x
3. Step 3: Cross multiply
   301,906.72x = 416,622.52 × 172,840.88
4. Step 4: Simplify right side
   301,906.72x = 72,009,402,984.62
5. Step 5: Solve for x
   x = 72,009,402,984.62/301,906.72
6. Step 6: Final answer
   x = 238,515.40