Finding the Fourth Proportional to 13,820.56, 19,073.05 and 7,772.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,820.56 : 19,073.05 = 7,772.71 : x
2. Step 2: Convert to fraction form
   13,820.56/19,073.05 = 7,772.71/x
3. Step 3: Cross multiply
   13,820.56x = 19,073.05 × 7,772.71
4. Step 4: Simplify right side
   13,820.56x = 148,249,286.47
5. Step 5: Solve for x
   x = 148,249,286.47/13,820.56
6. Step 6: Final answer
   x = 10,726.72