Finding the Fourth Proportional to 35,983.10, 53,991.30 and 13,789.10

Step by Step Solution

1. Step 1: Write the proportion equation
   35,983.10 : 53,991.30 = 13,789.10 : x
2. Step 2: Convert to fraction form
   35,983.10/53,991.30 = 13,789.10/x
3. Step 3: Cross multiply
   35,983.10x = 53,991.30 × 13,789.10
4. Step 4: Simplify right side
   35,983.10x = 744,491,434.83
5. Step 5: Solve for x
   x = 744,491,434.83/35,983.10
6. Step 6: Final answer
   x = 20,690.03