Finding the Fourth Proportional to 42,705.84, 64,097.83 and 21,660.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,705.84 : 64,097.83 = 21,660.42 : x
2. Step 2: Convert to fraction form
   42,705.84/64,097.83 = 21,660.42/x
3. Step 3: Cross multiply
   42,705.84x = 64,097.83 × 21,660.42
4. Step 4: Simplify right side
   42,705.84x = 1,388,385,544.25
5. Step 5: Solve for x
   x = 1,388,385,544.25/42,705.84
6. Step 6: Final answer
   x = 32,510.44