Finding the Fourth Proportional to 37,309.20, 55,978.34 and 13,937.46

Step by Step Solution

1. Step 1: Write the proportion equation
   37,309.20 : 55,978.34 = 13,937.46 : x
2. Step 2: Convert to fraction form
   37,309.20/55,978.34 = 13,937.46/x
3. Step 3: Cross multiply
   37,309.20x = 55,978.34 × 13,937.46
4. Step 4: Simplify right side
   37,309.20x = 780,195,804.93
5. Step 5: Solve for x
   x = 780,195,804.93/37,309.20
6. Step 6: Final answer
   x = 20,911.62