Finding the Fourth Proportional to 42,860.10, 64,247.63 and 21,737.33

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860.10 : 64,247.63 = 21,737.33 : x
2. Step 2: Convert to fraction form
   42,860.10/64,247.63 = 21,737.33/x
3. Step 3: Cross multiply
   42,860.10x = 64,247.63 × 21,737.33
4. Step 4: Simplify right side
   42,860.10x = 1,396,571,505.10
5. Step 5: Solve for x
   x = 1,396,571,505.10/42,860.10
6. Step 6: Final answer
   x = 32,584.42