Finding the Fourth Proportional to 13,705.35, 20,558.52 and 7,040.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,705.35 : 20,558.52 = 7,040.06 : x
2. Step 2: Convert to fraction form
   13,705.35/20,558.52 = 7,040.06/x
3. Step 3: Cross multiply
   13,705.35x = 20,558.52 × 7,040.06
4. Step 4: Simplify right side
   13,705.35x = 144,733,111.52
5. Step 5: Solve for x
   x = 144,733,111.52/13,705.35
6. Step 6: Final answer
   x = 10,560.34