Finding the Fourth Proportional to 42,885.82, 64,329.54 and 13,304.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,885.82 : 64,329.54 = 13,304.62 : x
2. Step 2: Convert to fraction form
   42,885.82/64,329.54 = 13,304.62/x
3. Step 3: Cross multiply
   42,885.82x = 64,329.54 × 13,304.62
4. Step 4: Simplify right side
   42,885.82x = 855,880,084.47
5. Step 5: Solve for x
   x = 855,880,084.47/42,885.82
6. Step 6: Final answer
   x = 19,957.18