Finding the Fourth Proportional to 53,221.55, 79,838.69 and 21,624.86

Step by Step Solution

1. Step 1: Write the proportion equation
   53,221.55 : 79,838.69 = 21,624.86 : x
2. Step 2: Convert to fraction form
   53,221.55/79,838.69 = 21,624.86/x
3. Step 3: Cross multiply
   53,221.55x = 79,838.69 × 21,624.86
4. Step 4: Simplify right side
   53,221.55x = 1,726,499,986.52
5. Step 5: Solve for x
   x = 1,726,499,986.52/53,221.55
6. Step 6: Final answer
   x = 32,439.87