Finding the Fourth Proportional to 13,789.56, 19,031.56 and 7,822.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,789.56 : 19,031.56 = 7,822.72 : x
2. Step 2: Convert to fraction form
   13,789.56/19,031.56 = 7,822.72/x
3. Step 3: Cross multiply
   13,789.56x = 19,031.56 × 7,822.72
4. Step 4: Simplify right side
   13,789.56x = 148,878,565.04
5. Step 5: Solve for x
   x = 148,878,565.04/13,789.56
6. Step 6: Final answer
   x = 10,796.47