Finding the Fourth Proportional to 21,235.30, 31,856.96 and 7,004.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,235.30 : 31,856.96 = 7,004.59 : x
2. Step 2: Convert to fraction form
   21,235.30/31,856.96 = 7,004.59/x
3. Step 3: Cross multiply
   21,235.30x = 31,856.96 × 7,004.59
4. Step 4: Simplify right side
   21,235.30x = 223,144,881.32
5. Step 5: Solve for x
   x = 223,144,881.32/21,235.30
6. Step 6: Final answer
   x = 10,508.21