Finding the Fourth Proportional to 329,507.83, 494,164.85 and 139,966.69

Step by Step Solution

1. Step 1: Write the proportion equation
   329,507.83 : 494,164.85 = 139,966.69 : x
2. Step 2: Convert to fraction form
   329,507.83/494,164.85 = 139,966.69/x
3. Step 3: Cross multiply
   329,507.83x = 494,164.85 × 139,966.69
4. Step 4: Simplify right side
   329,507.83x = 69,166,617,483.35
5. Step 5: Solve for x
   x = 69,166,617,483.35/329,507.83
6. Step 6: Final answer
   x = 209,908.88