Finding the Fourth Proportional to 21,051.31, 31,570.39 and 7,008.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051.31 : 31,570.39 = 7,008.06 : x
2. Step 2: Convert to fraction form
   21,051.31/31,570.39 = 7,008.06/x
3. Step 3: Cross multiply
   21,051.31x = 31,570.39 × 7,008.06
4. Step 4: Simplify right side
   21,051.31x = 221,247,187.34
5. Step 5: Solve for x
   x = 221,247,187.34/21,051.31
6. Step 6: Final answer
   x = 10,509.90