Finding the Fourth Proportional to 21,056.99, 31,574.92 and 7,012.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,056.99 : 31,574.92 = 7,012.07 : x
2. Step 2: Convert to fraction form
   21,056.99/31,574.92 = 7,012.07/x
3. Step 3: Cross multiply
   21,056.99x = 31,574.92 × 7,012.07
4. Step 4: Simplify right side
   21,056.99x = 221,405,549.28
5. Step 5: Solve for x
   x = 221,405,549.28/21,056.99
6. Step 6: Final answer
   x = 10,514.59