Finding the Fourth Proportional to 53,456.72, 80,202.89 and 17,921.55

Step by Step Solution

1. Step 1: Write the proportion equation
   53,456.72 : 80,202.89 = 17,921.55 : x
2. Step 2: Convert to fraction form
   53,456.72/80,202.89 = 17,921.55/x
3. Step 3: Cross multiply
   53,456.72x = 80,202.89 × 17,921.55
4. Step 4: Simplify right side
   53,456.72x = 1,437,359,612.66
5. Step 5: Solve for x
   x = 1,437,359,612.66/53,456.72
6. Step 6: Final answer
   x = 26,888.29