Finding the Fourth Proportional to 21,298.08, 31,942.72 and 5,712

Step by Step Solution

1. Step 1: Write the proportion equation
   21,298.08 : 31,942.72 = 5,712 : x
2. Step 2: Convert to fraction form
   21,298.08/31,942.72 = 5,712/x
3. Step 3: Cross multiply
   21,298.08x = 31,942.72 × 5,712
4. Step 4: Simplify right side
   21,298.08x = 182,456,816.64
5. Step 5: Solve for x
   x = 182,456,816.64/21,298.08
6. Step 6: Final answer
   x = 8,566.82