Finding the Fourth Proportional to 54,684.89, 81,978.12 and 19,616.34

Step by Step Solution

1. Step 1: Write the proportion equation
   54,684.89 : 81,978.12 = 19,616.34 : x
2. Step 2: Convert to fraction form
   54,684.89/81,978.12 = 19,616.34/x
3. Step 3: Cross multiply
   54,684.89x = 81,978.12 × 19,616.34
4. Step 4: Simplify right side
   54,684.89x = 1,608,110,674.48
5. Step 5: Solve for x
   x = 1,608,110,674.48/54,684.89
6. Step 6: Final answer
   x = 29,406.86