Finding the Fourth Proportional to 31,525.69, 43,501.72 and 21,450.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,525.69 : 43,501.72 = 21,450.91 : x
2. Step 2: Convert to fraction form
   31,525.69/43,501.72 = 21,450.91/x
3. Step 3: Cross multiply
   31,525.69x = 43,501.72 × 21,450.91
4. Step 4: Simplify right side
   31,525.69x = 933,151,480.57
5. Step 5: Solve for x
   x = 933,151,480.57/31,525.69
6. Step 6: Final answer
   x = 29,599.72