Finding the Fourth Proportional to 42,369.34, 63,554.43 and 12,787.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,369.34 : 63,554.43 = 12,787.42 : x
2. Step 2: Convert to fraction form
   42,369.34/63,554.43 = 12,787.42/x
3. Step 3: Cross multiply
   42,369.34x = 63,554.43 × 12,787.42
4. Step 4: Simplify right side
   42,369.34x = 812,696,871.50
5. Step 5: Solve for x
   x = 812,696,871.50/42,369.34
6. Step 6: Final answer
   x = 19,181.25