Finding the Fourth Proportional to 42,986.82, 64,450.81 and 21,886.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,986.82 : 64,450.81 = 21,886.02 : x
2. Step 2: Convert to fraction form
   42,986.82/64,450.81 = 21,886.02/x
3. Step 3: Cross multiply
   42,986.82x = 64,450.81 × 21,886.02
4. Step 4: Simplify right side
   42,986.82x = 1,410,571,985.72
5. Step 5: Solve for x
   x = 1,410,571,985.72/42,986.82
6. Step 6: Final answer
   x = 32,814.06