Finding the Fourth Proportional to 37,293.36, 55,949.76 and 13,920

Step by Step Solution

1. Step 1: Write the proportion equation
   37,293.36 : 55,949.76 = 13,920 : x
2. Step 2: Convert to fraction form
   37,293.36/55,949.76 = 13,920/x
3. Step 3: Cross multiply
   37,293.36x = 55,949.76 × 13,920
4. Step 4: Simplify right side
   37,293.36x = 778,820,659.20
5. Step 5: Solve for x
   x = 778,820,659.20/37,293.36
6. Step 6: Final answer
   x = 20,883.63