Finding the Fourth Proportional to 12,985.33, 19,471.06 and 6,739.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.33 : 19,471.06 = 6,739.05 : x
2. Step 2: Convert to fraction form
   12,985.33/19,471.06 = 6,739.05/x
3. Step 3: Cross multiply
   12,985.33x = 19,471.06 × 6,739.05
4. Step 4: Simplify right side
   12,985.33x = 131,216,446.89
5. Step 5: Solve for x
   x = 131,216,446.89/12,985.33
6. Step 6: Final answer
   x = 10,104.98