Finding the Fourth Proportional to 25,128.06, 34,707.51 and 18,404.34

Step by Step Solution

1. Step 1: Write the proportion equation
   25,128.06 : 34,707.51 = 18,404.34 : x
2. Step 2: Convert to fraction form
   25,128.06/34,707.51 = 18,404.34/x
3. Step 3: Cross multiply
   25,128.06x = 34,707.51 × 18,404.34
4. Step 4: Simplify right side
   25,128.06x = 638,768,814.59
5. Step 5: Solve for x
   x = 638,768,814.59/25,128.06
6. Step 6: Final answer
   x = 25,420.54