Finding the Fourth Proportional to 37,908.68, 52,309.78 and 21,990.04

Step by Step Solution

1. Step 1: Write the proportion equation
   37,908.68 : 52,309.78 = 21,990.04 : x
2. Step 2: Convert to fraction form
   37,908.68/52,309.78 = 21,990.04/x
3. Step 3: Cross multiply
   37,908.68x = 52,309.78 × 21,990.04
4. Step 4: Simplify right side
   37,908.68x = 1,150,294,154.59
5. Step 5: Solve for x
   x = 1,150,294,154.59/37,908.68
6. Step 6: Final answer
   x = 30,343.82