Finding the Fourth Proportional to 53,310.72, 79,965.69 and 21,713.34

Step by Step Solution

1. Step 1: Write the proportion equation
   53,310.72 : 79,965.69 = 21,713.34 : x
2. Step 2: Convert to fraction form
   53,310.72/79,965.69 = 21,713.34/x
3. Step 3: Cross multiply
   53,310.72x = 79,965.69 × 21,713.34
4. Step 4: Simplify right side
   53,310.72x = 1,736,322,215.30
5. Step 5: Solve for x
   x = 1,736,322,215.30/53,310.72
6. Step 6: Final answer
   x = 32,569.85