Finding the Fourth Proportional to 32,986.72, 45,490.80 and 21,057.76

Step by Step Solution

1. Step 1: Write the proportion equation
   32,986.72 : 45,490.80 = 21,057.76 : x
2. Step 2: Convert to fraction form
   32,986.72/45,490.80 = 21,057.76/x
3. Step 3: Cross multiply
   32,986.72x = 45,490.80 × 21,057.76
4. Step 4: Simplify right side
   32,986.72x = 957,934,348.61
5. Step 5: Solve for x
   x = 957,934,348.61/32,986.72
6. Step 6: Final answer
   x = 29,040.00