Finding the Fourth Proportional to 42,866.10, 64,256.62 and 21,743.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,866.10 : 64,256.62 = 21,743.32 : x
2. Step 2: Convert to fraction form
   42,866.10/64,256.62 = 21,743.32/x
3. Step 3: Cross multiply
   42,866.10x = 64,256.62 × 21,743.32
4. Step 4: Simplify right side
   42,866.10x = 1,397,152,250.78
5. Step 5: Solve for x
   x = 1,397,152,250.78/42,866.10
6. Step 6: Final answer
   x = 32,593.41