Finding the Fourth Proportional to 30,962.79, 42,738.48 and 19,784.79

Step by Step Solution

1. Step 1: Write the proportion equation
   30,962.79 : 42,738.48 = 19,784.79 : x
2. Step 2: Convert to fraction form
   30,962.79/42,738.48 = 19,784.79/x
3. Step 3: Cross multiply
   30,962.79x = 42,738.48 × 19,784.79
4. Step 4: Simplify right side
   30,962.79x = 845,571,851.72
5. Step 5: Solve for x
   x = 845,571,851.72/30,962.79
6. Step 6: Final answer
   x = 27,309.29