Finding the Fourth Proportional to 300,064.90, 414,128.74 and 172,745.86

Step by Step Solution

1. Step 1: Write the proportion equation
   300,064.90 : 414,128.74 = 172,745.86 : x
2. Step 2: Convert to fraction form
   300,064.90/414,128.74 = 172,745.86/x
3. Step 3: Cross multiply
   300,064.90x = 414,128.74 × 172,745.86
4. Step 4: Simplify right side
   300,064.90x = 71,539,025,342.02
5. Step 5: Solve for x
   x = 71,539,025,342.02/300,064.90
6. Step 6: Final answer
   x = 238,411.84