Finding the Fourth Proportional to 42,826.32, 64,236.24 and 13,244.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,826.32 : 64,236.24 = 13,244.34 : x
2. Step 2: Convert to fraction form
   42,826.32/64,236.24 = 13,244.34/x
3. Step 3: Cross multiply
   42,826.32x = 64,236.24 × 13,244.34
4. Step 4: Simplify right side
   42,826.32x = 850,766,602.88
5. Step 5: Solve for x
   x = 850,766,602.88/42,826.32
6. Step 6: Final answer
   x = 19,865.51