Finding the Fourth Proportional to 42,128.14, 63,107.43 and 19,962.89

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.14 : 63,107.43 = 19,962.89 : x
2. Step 2: Convert to fraction form
   42,128.14/63,107.43 = 19,962.89/x
3. Step 3: Cross multiply
   42,128.14x = 63,107.43 × 19,962.89
4. Step 4: Simplify right side
   42,128.14x = 1,259,806,683.27
5. Step 5: Solve for x
   x = 1,259,806,683.27/42,128.14
6. Step 6: Final answer
   x = 29,904.16