Finding the Fourth Proportional to 42,866.40, 64,339.49 and 21,822.19

Step by Step Solution

1. Step 1: Write the proportion equation
   42,866.40 : 64,339.49 = 21,822.19 : x
2. Step 2: Convert to fraction form
   42,866.40/64,339.49 = 21,822.19/x
3. Step 3: Cross multiply
   42,866.40x = 64,339.49 × 21,822.19
4. Step 4: Simplify right side
   42,866.40x = 1,404,028,785.66
5. Step 5: Solve for x
   x = 1,404,028,785.66/42,866.40
6. Step 6: Final answer
   x = 32,753.60