Finding the Fourth Proportional to 42,243, 63,339.90 and 18,549.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,243 : 63,339.90 = 18,549.59 : x
2. Step 2: Convert to fraction form
   42,243/63,339.90 = 18,549.59/x
3. Step 3: Cross multiply
   42,243x = 63,339.90 × 18,549.59
4. Step 4: Simplify right side
   42,243x = 1,174,928,858.94
5. Step 5: Solve for x
   x = 1,174,928,858.94/42,243
6. Step 6: Final answer
   x = 27,813.58