Finding the Fourth Proportional to 42,644, 63,878.64 and 21,554.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,644 : 63,878.64 = 21,554.48 : x
2. Step 2: Convert to fraction form
   42,644/63,878.64 = 21,554.48/x
3. Step 3: Cross multiply
   42,644x = 63,878.64 × 21,554.48
4. Step 4: Simplify right side
   42,644x = 1,376,870,868.31
5. Step 5: Solve for x
   x = 1,376,870,868.31/42,644
6. Step 6: Final answer
   x = 32,287.56