Finding the Fourth Proportional to 13,026.72, 19,539.80 and 3,166.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,026.72 : 19,539.80 = 3,166.05 : x
2. Step 2: Convert to fraction form
   13,026.72/19,539.80 = 3,166.05/x
3. Step 3: Cross multiply
   13,026.72x = 19,539.80 × 3,166.05
4. Step 4: Simplify right side
   13,026.72x = 61,863,983.79
5. Step 5: Solve for x
   x = 61,863,983.79/13,026.72
6. Step 6: Final answer
   x = 4,749.01