Finding the Fourth Proportional to 13,980.72, 19,293.06 and 8,015.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,980.72 : 19,293.06 = 8,015.88 : x
2. Step 2: Convert to fraction form
   13,980.72/19,293.06 = 8,015.88/x
3. Step 3: Cross multiply
   13,980.72x = 19,293.06 × 8,015.88
4. Step 4: Simplify right side
   13,980.72x = 154,650,853.79
5. Step 5: Solve for x
   x = 154,650,853.79/13,980.72
6. Step 6: Final answer
   x = 11,061.72