Finding the Fourth Proportional to 42,744.84, 64,123.32 and 13,165.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,744.84 : 64,123.32 = 13,165.08 : x
2. Step 2: Convert to fraction form
   42,744.84/64,123.32 = 13,165.08/x
3. Step 3: Cross multiply
   42,744.84x = 64,123.32 × 13,165.08
4. Step 4: Simplify right side
   42,744.84x = 844,188,637.67
5. Step 5: Solve for x
   x = 844,188,637.67/42,744.84
6. Step 6: Final answer
   x = 19,749.49