Finding the Fourth Proportional to 43,573.10, 65,353.46 and 13,987.10

Step by Step Solution

1. Step 1: Write the proportion equation
   43,573.10 : 65,353.46 = 13,987.10 : x
2. Step 2: Convert to fraction form
   43,573.10/65,353.46 = 13,987.10/x
3. Step 3: Cross multiply
   43,573.10x = 65,353.46 × 13,987.10
4. Step 4: Simplify right side
   43,573.10x = 914,105,380.37
5. Step 5: Solve for x
   x = 914,105,380.37/43,573.10
6. Step 6: Final answer
   x = 20,978.66