Finding the Fourth Proportional to 53,978.43, 80,965.35 and 18,442.94

Step by Step Solution

1. Step 1: Write the proportion equation
   53,978.43 : 80,965.35 = 18,442.94 : x
2. Step 2: Convert to fraction form
   53,978.43/80,965.35 = 18,442.94/x
3. Step 3: Cross multiply
   53,978.43x = 80,965.35 × 18,442.94
4. Step 4: Simplify right side
   53,978.43x = 1,493,238,687.30
5. Step 5: Solve for x
   x = 1,493,238,687.30/53,978.43
6. Step 6: Final answer
   x = 27,663.62