Finding the Fourth Proportional to 42,018.84, 63,021.78 and 18,641.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,018.84 : 63,021.78 = 18,641.16 : x
2. Step 2: Convert to fraction form
   42,018.84/63,021.78 = 18,641.16/x
3. Step 3: Cross multiply
   42,018.84x = 63,021.78 × 18,641.16
4. Step 4: Simplify right side
   42,018.84x = 1,174,799,084.46
5. Step 5: Solve for x
   x = 1,174,799,084.46/42,018.84
6. Step 6: Final answer
   x = 27,958.87