Finding the Fourth Proportional to 53,053.72, 79,581.30 and 21,478.84

Step by Step Solution

1. Step 1: Write the proportion equation
   53,053.72 : 79,581.30 = 21,478.84 : x
2. Step 2: Convert to fraction form
   53,053.72/79,581.30 = 21,478.84/x
3. Step 3: Cross multiply
   53,053.72x = 79,581.30 × 21,478.84
4. Step 4: Simplify right side
   53,053.72x = 1,709,314,009.69
5. Step 5: Solve for x
   x = 1,709,314,009.69/53,053.72
6. Step 6: Final answer
   x = 32,218.55