Finding the Fourth Proportional to 21,051.27, 31,581.95 and 7,011.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051.27 : 31,581.95 = 7,011.42 : x
2. Step 2: Convert to fraction form
   21,051.27/31,581.95 = 7,011.42/x
3. Step 3: Cross multiply
   21,051.27x = 31,581.95 × 7,011.42
4. Step 4: Simplify right side
   21,051.27x = 221,434,280.81
5. Step 5: Solve for x
   x = 221,434,280.81/21,051.27
6. Step 6: Final answer
   x = 10,518.81