Finding the Fourth Proportional to 42,136.50, 63,215.15 and 12,554.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,136.50 : 63,215.15 = 12,554.22 : x
2. Step 2: Convert to fraction form
   42,136.50/63,215.15 = 12,554.22/x
3. Step 3: Cross multiply
   42,136.50x = 63,215.15 × 12,554.22
4. Step 4: Simplify right side
   42,136.50x = 793,616,900.43
5. Step 5: Solve for x
   x = 793,616,900.43/42,136.50
6. Step 6: Final answer
   x = 18,834.43