Finding the Fourth Proportional to 25,388.78, 35,036.53 and 13,903.63

Step by Step Solution

1. Step 1: Write the proportion equation
   25,388.78 : 35,036.53 = 13,903.63 : x
2. Step 2: Convert to fraction form
   25,388.78/35,036.53 = 13,903.63/x
3. Step 3: Cross multiply
   25,388.78x = 35,036.53 × 13,903.63
4. Step 4: Simplify right side
   25,388.78x = 487,134,827.25
5. Step 5: Solve for x
   x = 487,134,827.25/25,388.78
6. Step 6: Final answer
   x = 19,187.02