Finding the Fourth Proportional to 52,900.48, 79,383.12 and 21,304.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,900.48 : 79,383.12 = 21,304.72 : x
2. Step 2: Convert to fraction form
   52,900.48/79,383.12 = 21,304.72/x
3. Step 3: Cross multiply
   52,900.48x = 79,383.12 × 21,304.72
4. Step 4: Simplify right side
   52,900.48x = 1,691,235,144.33
5. Step 5: Solve for x
   x = 1,691,235,144.33/52,900.48
6. Step 6: Final answer
   x = 31,970.13