Finding the Fourth Proportional to 42,012.84, 63,012.78 and 18,635.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,012.84 : 63,012.78 = 18,635.16 : x
2. Step 2: Convert to fraction form
   42,012.84/63,012.78 = 18,635.16/x
3. Step 3: Cross multiply
   42,012.84x = 63,012.78 × 18,635.16
4. Step 4: Simplify right side
   42,012.84x = 1,174,253,237.34
5. Step 5: Solve for x
   x = 1,174,253,237.34/42,012.84
6. Step 6: Final answer
   x = 27,949.87