Finding the Fourth Proportional to 389,980.83, 584,971.43 and 140,662.83

Step by Step Solution

1. Step 1: Write the proportion equation
   389,980.83 : 584,971.43 = 140,662.83 : x
2. Step 2: Convert to fraction form
   389,980.83/584,971.43 = 140,662.83/x
3. Step 3: Cross multiply
   389,980.83x = 584,971.43 × 140,662.83
4. Step 4: Simplify right side
   389,980.83x = 82,283,736,109.63
5. Step 5: Solve for x
   x = 82,283,736,109.63/389,980.83
6. Step 6: Final answer
   x = 210,994.31