Finding the Fourth Proportional to 89,256.63, 133,819.30 and 42,542.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,256.63 : 133,819.30 = 42,542.31 : x
2. Step 2: Convert to fraction form
   89,256.63/133,819.30 = 42,542.31/x
3. Step 3: Cross multiply
   89,256.63x = 133,819.30 × 42,542.31
4. Step 4: Simplify right side
   89,256.63x = 5,692,982,144.58
5. Step 5: Solve for x
   x = 5,692,982,144.58/89,256.63
6. Step 6: Final answer
   x = 63,782.18