Finding the Fourth Proportional to 13,407.31, 20,111.99 and 3,546.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,407.31 : 20,111.99 = 3,546.33 : x
2. Step 2: Convert to fraction form
   13,407.31/20,111.99 = 3,546.33/x
3. Step 3: Cross multiply
   13,407.31x = 20,111.99 × 3,546.33
4. Step 4: Simplify right side
   13,407.31x = 71,323,753.50
5. Step 5: Solve for x
   x = 71,323,753.50/13,407.31
6. Step 6: Final answer
   x = 5,319.77