Finding the Fourth Proportional to 42,910.34, 64,364.69 and 13,327.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,910.34 : 64,364.69 = 13,327.52 : x
2. Step 2: Convert to fraction form
   42,910.34/64,364.69 = 13,327.52/x
3. Step 3: Cross multiply
   42,910.34x = 64,364.69 × 13,327.52
4. Step 4: Simplify right side
   42,910.34x = 857,821,304.81
5. Step 5: Solve for x
   x = 857,821,304.81/42,910.34
6. Step 6: Final answer
   x = 19,991.02