Finding the Fourth Proportional to 33,215.57, 45,811.56 and 21,280.01

Step by Step Solution

1. Step 1: Write the proportion equation
   33,215.57 : 45,811.56 = 21,280.01 : x
2. Step 2: Convert to fraction form
   33,215.57/45,811.56 = 21,280.01/x
3. Step 3: Cross multiply
   33,215.57x = 45,811.56 × 21,280.01
4. Step 4: Simplify right side
   33,215.57x = 974,870,454.92
5. Step 5: Solve for x
   x = 974,870,454.92/33,215.57
6. Step 6: Final answer
   x = 29,349.80