Finding the Fourth Proportional to 42,449, 63,673.50 and 13,265

Step by Step Solution

1. Step 1: Write the proportion equation
   42,449 : 63,673.50 = 13,265 : x
2. Step 2: Convert to fraction form
   42,449/63,673.50 = 13,265/x
3. Step 3: Cross multiply
   42,449x = 63,673.50 × 13,265
4. Step 4: Simplify right side
   42,449x = 844,628,977.50
5. Step 5: Solve for x
   x = 844,628,977.50/42,449
6. Step 6: Final answer
   x = 19,897.50