Finding the Fourth Proportional to 30,840.48, 42,552 and 19,656

Step by Step Solution

1. Step 1: Write the proportion equation
   30,840.48 : 42,552 = 19,656 : x
2. Step 2: Convert to fraction form
   30,840.48/42,552 = 19,656/x
3. Step 3: Cross multiply
   30,840.48x = 42,552 × 19,656
4. Step 4: Simplify right side
   30,840.48x = 836,402,112
5. Step 5: Solve for x
   x = 836,402,112/30,840.48
6. Step 6: Final answer
   x = 27,120.27