Finding the Fourth Proportional to 25,259.82, 34,858.80 and 13,929.72

Step by Step Solution

1. Step 1: Write the proportion equation
   25,259.82 : 34,858.80 = 13,929.72 : x
2. Step 2: Convert to fraction form
   25,259.82/34,858.80 = 13,929.72/x
3. Step 3: Cross multiply
   25,259.82x = 34,858.80 × 13,929.72
4. Step 4: Simplify right side
   25,259.82x = 485,573,323.54
5. Step 5: Solve for x
   x = 485,573,323.54/25,259.82
6. Step 6: Final answer
   x = 19,223.15