Finding the Fourth Proportional to 43,485.49, 65,222.79 and 13,900.87

Step by Step Solution

1. Step 1: Write the proportion equation
   43,485.49 : 65,222.79 = 13,900.87 : x
2. Step 2: Convert to fraction form
   43,485.49/65,222.79 = 13,900.87/x
3. Step 3: Cross multiply
   43,485.49x = 65,222.79 × 13,900.87
4. Step 4: Simplify right side
   43,485.49x = 906,653,524.83
5. Step 5: Solve for x
   x = 906,653,524.83/43,485.49
6. Step 6: Final answer
   x = 20,849.56