Finding the Fourth Proportional to 51,043.86, 76,548.78 and 21,456.18

Step by Step Solution

1. Step 1: Write the proportion equation
   51,043.86 : 76,548.78 = 21,456.18 : x
2. Step 2: Convert to fraction form
   51,043.86/76,548.78 = 21,456.18/x
3. Step 3: Cross multiply
   51,043.86x = 76,548.78 × 21,456.18
4. Step 4: Simplify right side
   51,043.86x = 1,642,444,402.46
5. Step 5: Solve for x
   x = 1,642,444,402.46/51,043.86
6. Step 6: Final answer
   x = 32,177.12