Finding the Fourth Proportional to 14,280.76, 19,707.47 and 7,820.37

Step by Step Solution

1. Step 1: Write the proportion equation
   14,280.76 : 19,707.47 = 7,820.37 : x
2. Step 2: Convert to fraction form
   14,280.76/19,707.47 = 7,820.37/x
3. Step 3: Cross multiply
   14,280.76x = 19,707.47 × 7,820.37
4. Step 4: Simplify right side
   14,280.76x = 154,119,726.71
5. Step 5: Solve for x
   x = 154,119,726.71/14,280.76
6. Step 6: Final answer
   x = 10,792.12