Finding the Fourth Proportional to 55,216.89, 82,838.56 and 17,780.48

Step by Step Solution

1. Step 1: Write the proportion equation
   55,216.89 : 82,838.56 = 17,780.48 : x
2. Step 2: Convert to fraction form
   55,216.89/82,838.56 = 17,780.48/x
3. Step 3: Cross multiply
   55,216.89x = 82,838.56 × 17,780.48
4. Step 4: Simplify right side
   55,216.89x = 1,472,909,359.31
5. Step 5: Solve for x
   x = 1,472,909,359.31/55,216.89
6. Step 6: Final answer
   x = 26,674.98