Finding the Fourth Proportional to 329,109.72, 493,566.77 and 139,567.29

Step by Step Solution

1. Step 1: Write the proportion equation
   329,109.72 : 493,566.77 = 139,567.29 : x
2. Step 2: Convert to fraction form
   329,109.72/493,566.77 = 139,567.29/x
3. Step 3: Cross multiply
   329,109.72x = 493,566.77 × 139,567.29
4. Step 4: Simplify right side
   329,109.72x = 68,885,775,825.12
5. Step 5: Solve for x
   x = 68,885,775,825.12/329,109.72
6. Step 6: Final answer
   x = 209,309.45