Finding the Fourth Proportional to 31,725.48, 43,798.86 and 21,669

Step by Step Solution

1. Step 1: Write the proportion equation
   31,725.48 : 43,798.86 = 21,669 : x
2. Step 2: Convert to fraction form
   31,725.48/43,798.86 = 21,669/x
3. Step 3: Cross multiply
   31,725.48x = 43,798.86 × 21,669
4. Step 4: Simplify right side
   31,725.48x = 949,077,497.34
5. Step 5: Solve for x
   x = 949,077,497.34/31,725.48
6. Step 6: Final answer
   x = 29,915.31