Finding the Fourth Proportional to 42,825.32, 64,234.74 and 13,243.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,825.32 : 64,234.74 = 13,243.34 : x
2. Step 2: Convert to fraction form
   42,825.32/64,234.74 = 13,243.34/x
3. Step 3: Cross multiply
   42,825.32x = 64,234.74 × 13,243.34
4. Step 4: Simplify right side
   42,825.32x = 850,682,501.63
5. Step 5: Solve for x
   x = 850,682,501.63/42,825.32
6. Step 6: Final answer
   x = 19,864.01