Finding the Fourth Proportional to 52,980.16, 79,469.16 and 21,389.38

Step by Step Solution

1. Step 1: Write the proportion equation
   52,980.16 : 79,469.16 = 21,389.38 : x
2. Step 2: Convert to fraction form
   52,980.16/79,469.16 = 21,389.38/x
3. Step 3: Cross multiply
   52,980.16x = 79,469.16 × 21,389.38
4. Step 4: Simplify right side
   52,980.16x = 1,699,796,061.52
5. Step 5: Solve for x
   x = 1,699,796,061.52/52,980.16
6. Step 6: Final answer
   x = 32,083.63