Finding the Fourth Proportional to 306,978.06, 423,623.34 and 171,011.82

Step by Step Solution

1. Step 1: Write the proportion equation
   306,978.06 : 423,623.34 = 171,011.82 : x
2. Step 2: Convert to fraction form
   306,978.06/423,623.34 = 171,011.82/x
3. Step 3: Cross multiply
   306,978.06x = 423,623.34 × 171,011.82
4. Step 4: Simplify right side
   306,978.06x = 72,444,598,367.88
5. Step 5: Solve for x
   x = 72,444,598,367.88/306,978.06
6. Step 6: Final answer
   x = 235,992.76