Finding the Fourth Proportional to 25,643.31, 35,349 and 19,968.05

Step by Step Solution

1. Step 1: Write the proportion equation
   25,643.31 : 35,349 = 19,968.05 : x
2. Step 2: Convert to fraction form
   25,643.31/35,349 = 19,968.05/x
3. Step 3: Cross multiply
   25,643.31x = 35,349 × 19,968.05
4. Step 4: Simplify right side
   25,643.31x = 705,850,422.71
5. Step 5: Solve for x
   x = 705,850,422.71/25,643.31
6. Step 6: Final answer
   x = 27,525.71