Finding the Fourth Proportional to 38,525, 53,164.50 and 20,861

Step by Step Solution

1. Step 1: Write the proportion equation
   38,525 : 53,164.50 = 20,861 : x
2. Step 2: Convert to fraction form
   38,525/53,164.50 = 20,861/x
3. Step 3: Cross multiply
   38,525x = 53,164.50 × 20,861
4. Step 4: Simplify right side
   38,525x = 1,109,064,634.50
5. Step 5: Solve for x
   x = 1,109,064,634.50/38,525
6. Step 6: Final answer
   x = 28,788.18