Finding the Fourth Proportional to 37,905.68, 52,305.65 and 21,987.05

Step by Step Solution

1. Step 1: Write the proportion equation
   37,905.68 : 52,305.65 = 21,987.05 : x
2. Step 2: Convert to fraction form
   37,905.68/52,305.65 = 21,987.05/x
3. Step 3: Cross multiply
   37,905.68x = 52,305.65 × 21,987.05
4. Step 4: Simplify right side
   37,905.68x = 1,150,046,570.37
5. Step 5: Solve for x
   x = 1,150,046,570.37/37,905.68
6. Step 6: Final answer
   x = 30,339.69