Finding the Fourth Proportional to 25,535.94, 38,224.71 and 13,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   25,535.94 : 38,224.71 = 13,820.10 : x
2. Step 2: Convert to fraction form
   25,535.94/38,224.71 = 13,820.10/x
3. Step 3: Cross multiply
   25,535.94x = 38,224.71 × 13,820.10
4. Step 4: Simplify right side
   25,535.94x = 528,269,314.67
5. Step 5: Solve for x
   x = 528,269,314.67/25,535.94
6. Step 6: Final answer
   x = 20,687.29