Finding the Fourth Proportional to 38,947.64, 53,747.69 and 21,956.00

Step by Step Solution

1. Step 1: Write the proportion equation
   38,947.64 : 53,747.69 = 21,956.00 : x
2. Step 2: Convert to fraction form
   38,947.64/53,747.69 = 21,956.00/x
3. Step 3: Cross multiply
   38,947.64x = 53,747.69 × 21,956.00
4. Step 4: Simplify right side
   38,947.64x = 1,180,083,903.12
5. Step 5: Solve for x
   x = 1,180,083,903.12/38,947.64
6. Step 6: Final answer
   x = 30,299.24