Finding the Fourth Proportional to 38,448.06, 53,057.61 and 21,681.06

Step by Step Solution

1. Step 1: Write the proportion equation
   38,448.06 : 53,057.61 = 21,681.06 : x
2. Step 2: Convert to fraction form
   38,448.06/53,057.61 = 21,681.06/x
3. Step 3: Cross multiply
   38,448.06x = 53,057.61 × 21,681.06
4. Step 4: Simplify right side
   38,448.06x = 1,150,345,225.87
5. Step 5: Solve for x
   x = 1,150,345,225.87/38,448.06
6. Step 6: Final answer
   x = 29,919.46